diff --git a/app/components/post_textbox/post_textbox.test.js b/app/components/post_textbox/post_textbox.test.js
index 5888cadb3..7086c92ef 100644
--- a/app/components/post_textbox/post_textbox.test.js
+++ b/app/components/post_textbox/post_textbox.test.js
@@ -7,11 +7,12 @@ import assert from 'assert';
 import {shallowWithIntl} from 'test/intl-test-helper';
 
 import Preferences from 'mattermost-redux/constants/preferences';
+import EventEmitter from 'mattermost-redux/utils/event_emitter';
 
 import Fade from 'app/components/fade';
 import SendButton from 'app/components/send_button';
 import PasteableTextInput from 'app/components/pasteable_text_input';
-import EventEmitter from 'mattermost-redux/utils/event_emitter';
+import EphemeralStore from 'app/store/ephemeral_store';
 
 import PostTextbox from './post_textbox.ios';
 
@@ -62,6 +63,7 @@ describe('PostTextBox', () => {
         cursorPositionEvent: '',
         valueEvent: '',
         isLandscape: false,
+        screenId: 'NavigationScreen1',
     };
 
     test('should match, full snapshot', () => {
@@ -343,6 +345,7 @@ describe('PostTextBox', () => {
         test('should show error dialog if error occured', () => {
             jest.spyOn(Alert, 'alert').mockReturnValue(null);
             const wrapper = shallowWithIntl(<PostTextbox {...baseProps}/>);
+            EphemeralStore.addNavigationComponentId('NavigationScreen1');
             wrapper.find(PasteableTextInput).first().simulate('paste', {error: 'some error'}, []);
             expect(Alert.alert).toHaveBeenCalled();
         });
@@ -350,6 +353,7 @@ describe('PostTextBox', () => {
         test('should show file max warning and not uploading', () => {
             jest.spyOn(EventEmitter, 'emit').mockReturnValue(null);
             const wrapper = shallowWithIntl(<PostTextbox {...baseProps}/>);
+            EphemeralStore.addNavigationComponentId('NavigationScreen1');
             wrapper.find(PasteableTextInput).first().simulate('paste', null, [
                 {
                     fileSize: 1000,
@@ -414,6 +418,7 @@ describe('PostTextBox', () => {
 
         test('should upload images', () => {
             const wrapper = shallowWithIntl(<PostTextbox {...baseProps}/>);
+            EphemeralStore.addNavigationComponentId('NavigationScreen1');
             wrapper.find(PasteableTextInput).first().simulate('paste', null, [
                 {
                     fileSize: 1000,
@@ -424,6 +429,20 @@ describe('PostTextBox', () => {
             ]);
             expect(baseProps.actions.initUploadFiles).toHaveBeenCalled();
         });
+
+        test('should NOT upload images when not the top most screen', () => {
+            const wrapper = shallowWithIntl(<PostTextbox {...baseProps}/>);
+            EphemeralStore.addNavigationComponentId('NavigationScreen2');
+            wrapper.find(PasteableTextInput).first().simulate('paste', null, [
+                {
+                    fileSize: 1000,
+                    fileName: 'fileName.png',
+                    type: 'images/png',
+                    url: 'path/to/image',
+                },
+            ]);
+            expect(baseProps.actions.initUploadFiles).not.toHaveBeenCalled();
+        });
     });
 });
 
diff --git a/app/components/post_textbox/post_textbox_base.js b/app/components/post_textbox/post_textbox_base.js
index f35b133ad..2cc9837b7 100644
--- a/app/components/post_textbox/post_textbox_base.js
+++ b/app/components/post_textbox/post_textbox_base.js
@@ -24,11 +24,12 @@ import AttachmentButton from 'app/components/attachment_button';
 import Fade from 'app/components/fade';
 import FormattedMarkdownText from 'app/components/formatted_markdown_text';
 import FormattedText from 'app/components/formatted_text';
-import SendButton from 'app/components/send_button';
 import PasteableTextInput from 'app/components/pasteable_text_input';
-
+import {paddingHorizontal as padding} from 'app/components/safe_area_view/iphone_x_spacing';
+import SendButton from 'app/components/send_button';
 import {INSERT_TO_COMMENT, INSERT_TO_DRAFT, IS_REACTION_REGEX, MAX_CONTENT_HEIGHT, MAX_FILE_COUNT} from 'app/constants/post_textbox';
 import {NOTIFY_ALL_MEMBERS} from 'app/constants/view';
+import EphemeralStore from 'app/store/ephemeral_store';
 import {t} from 'app/utils/i18n';
 import {confirmOutOfOfficeDisabled} from 'app/utils/status';
 import {
@@ -36,7 +37,6 @@ import {
     makeStyleSheetFromTheme,
     getKeyboardAppearanceFromTheme,
 } from 'app/utils/theme';
-import {paddingHorizontal as padding} from 'app/components/safe_area_view/iphone_x_spacing';
 
 const {RNTextInputReset} = NativeModules;
 
@@ -83,6 +83,7 @@ export default class PostTextBoxBase extends PureComponent {
         isTimezoneEnabled: PropTypes.bool,
         currentChannel: PropTypes.object,
         isLandscape: PropTypes.bool.isRequired,
+        screenId: PropTypes.string.isRequired,
     };
 
     static defaultProps = {
@@ -412,19 +413,19 @@ export default class PostTextBoxBase extends PureComponent {
         this.props.actions.initUploadFiles(images, this.props.rootId);
     };
 
-    isFileLoading() {
+    isFileLoading = () => {
         const {files} = this.props;
 
         return files.some((file) => file.loading);
-    }
+    };
 
-    isSendButtonVisible() {
+    isSendButtonVisible = () => {
         return this.canSend() || this.isFileLoading();
-    }
+    };
 
-    isSendButtonEnabled() {
+    isSendButtonEnabled = () => {
         return this.canSend() && !this.isFileLoading() && !this.state.sendingMessage;
-    }
+    };
 
     sendMessage = () => {
         const {value} = this.state;
@@ -445,7 +446,7 @@ export default class PostTextBoxBase extends PureComponent {
     textContainsAtAllAtChannel = (text) => {
         const textWithoutCode = text.replace(/(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)| *(`{3,}|~{3,})[ .]*(\S+)? *\n([\s\S]*?\s*)\3 *(?:\n+|$)/g, '');
         return (/\B@(all|channel)\b/i).test(textWithoutCode);
-    }
+    };
 
     showSendToAllOrChannelAlert = (currentMembersCount) => {
         const {intl} = this.context;
@@ -505,7 +506,7 @@ export default class PostTextBoxBase extends PureComponent {
                 },
             ],
         );
-    }
+    };
 
     doSubmitMessage = () => {
         const {actions, currentUserId, channelId, files, rootId} = this.props;
@@ -562,7 +563,7 @@ export default class PostTextBoxBase extends PureComponent {
         }
 
         EventEmitter.emit('scroll-to-bottom');
-    }
+    };
 
     getStatusFromSlashCommand = (message) => {
         const tokens = message.split(' ');
@@ -704,29 +705,31 @@ export default class PostTextBoxBase extends PureComponent {
                 },
             ]
         );
-    }
+    };
 
     handlePasteImages = (error, images) => {
-        if (error) {
-            this.showPasteImageErrorDialog();
-            return;
-        }
+        if (this.props.screenId === EphemeralStore.getNavigationTopComponentId()) {
+            if (error) {
+                this.showPasteImageErrorDialog();
+                return;
+            }
 
-        const {maxFileSize, files} = this.props;
-        const availableCount = MAX_FILE_COUNT - files.length;
-        if (images.length > availableCount) {
-            this.onShowFileMaxWarning();
-            return;
-        }
+            const {maxFileSize, files} = this.props;
+            const availableCount = MAX_FILE_COUNT - files.length;
+            if (images.length > availableCount) {
+                this.onShowFileMaxWarning();
+                return;
+            }
 
-        const largeImage = images.find((image) => image.fileSize > maxFileSize);
-        if (largeImage) {
-            this.onShowFileSizeWarning(largeImage.fileName);
-            return;
-        }
+            const largeImage = images.find((image) => image.fileSize > maxFileSize);
+            if (largeImage) {
+                this.onShowFileSizeWarning(largeImage.fileName);
+                return;
+            }
 
-        this.handleUploadFiles(images);
-    }
+            this.handleUploadFiles(images);
+        }
+    };
 
     renderDeactivatedChannel = () => {
         const {intl} = this.context;
@@ -740,7 +743,7 @@ export default class PostTextBoxBase extends PureComponent {
                 })}
             </Text>
         );
-    }
+    };
 
     renderTextBox = () => {
         const {intl} = this.context;
diff --git a/app/screens/channel/channel.android.js b/app/screens/channel/channel.android.js
index 866911888..478a7ef08 100644
--- a/app/screens/channel/channel.android.js
+++ b/app/screens/channel/channel.android.js
@@ -37,6 +37,7 @@ export default class ChannelAndroid extends ChannelBase {
                     </View>
                     <PostTextbox
                         ref={this.postTextbox}
+                        screenId={this.props.componentId}
                     />
                 </KeyboardLayout>
                 <ChannelLoader
diff --git a/app/screens/channel/channel.ios.js b/app/screens/channel/channel.ios.js
index 3319e7a92..6c9c6c5f5 100644
--- a/app/screens/channel/channel.ios.js
+++ b/app/screens/channel/channel.ios.js
@@ -80,6 +80,7 @@ export default class ChannelIOS extends ChannelBase {
                         cursorPositionEvent={CHANNEL_POST_TEXTBOX_CURSOR_CHANGE}
                         valueEvent={CHANNEL_POST_TEXTBOX_VALUE_CHANGE}
                         ref={this.postTextbox}
+                        screenId={this.props.componentId}
                     />
                 </KeyboardTrackingView>
             </React.Fragment>
diff --git a/app/screens/thread/thread.android.js b/app/screens/thread/thread.android.js
index 918ccc440..a2e60c209 100644
--- a/app/screens/thread/thread.android.js
+++ b/app/screens/thread/thread.android.js
@@ -44,10 +44,11 @@ export default class ThreadAndroid extends ThreadBase {
 
             postTextBox = (
                 <PostTextbox
-                    channelIsArchived={channelIsArchived}
-                    rootId={rootId}
                     channelId={channelId}
+                    channelIsArchived={channelIsArchived}
                     onCloseChannel={this.onCloseChannel}
+                    rootId={rootId}
+                    screenId={this.props.componentId}
                 />
             );
         } else {
diff --git a/app/screens/thread/thread.ios.js b/app/screens/thread/thread.ios.js
index b53125797..e094fe784 100644
--- a/app/screens/thread/thread.ios.js
+++ b/app/screens/thread/thread.ios.js
@@ -72,12 +72,13 @@ export default class ThreadIOS extends ThreadBase {
                     accessoriesContainerID={ACCESSORIES_CONTAINER_NATIVE_ID}
                 >
                     <PostTextbox
-                        ref={this.postTextbox}
-                        channelIsArchived={channelIsArchived}
-                        rootId={rootId}
                         channelId={channelId}
-                        onCloseChannel={this.onCloseChannel}
+                        channelIsArchived={channelIsArchived}
                         cursorPositionEvent={THREAD_POST_TEXTBOX_CURSOR_CHANGE}
+                        onCloseChannel={this.onCloseChannel}
+                        ref={this.postTextbox}
+                        rootId={rootId}
+                        screenId={this.props.componentId}
                         valueEvent={THREAD_POST_TEXTBOX_VALUE_CHANGE}
                     />
                 </KeyboardTrackingView>