diff --git a/web/chat/chat-input-bar.react.js b/web/chat/chat-input-bar.react.js
--- a/web/chat/chat-input-bar.react.js
+++ b/web/chat/chat-input-bar.react.js
@@ -156,6 +156,20 @@
         'none',
       );
     }
+
+    if (
+      this.props.suggestedUsers.length === 0 &&
+      this.props.inputState.typeaheadState.frozenSuggestedUsers.length !== 0
+    ) {
+      this.props.inputState.setTypeaheadState({ frozenSuggestedUsers: [] });
+    } else if (
+      this.props.suggestedUsers.length !== 0 &&
+      this.props.inputState.typeaheadState.frozenSuggestedUsers.length === 0
+    ) {
+      this.props.inputState.setTypeaheadState({
+        frozenSuggestedUsers: this.props.suggestedUsers,
+      });
+    }
   }
 
   static unassignedUploadIDs(
@@ -350,7 +364,9 @@
           inputState={this.props.inputState}
           textarea={this.textarea}
           matchedStrings={this.props.typeaheadMatchedStrings}
-          suggestedUsers={this.props.suggestedUsers}
+          suggestedUsers={
+            this.props.inputState.typeaheadState.frozenSuggestedUsers
+          }
         />
       );
     }
diff --git a/web/input/input-state-container.react.js b/web/input/input-state-container.react.js
--- a/web/input/input-state-container.react.js
+++ b/web/input/input-state-container.react.js
@@ -144,6 +144,7 @@
     textCursorPositions: {},
     typeaheadState: {
       canBeVisible: false,
+      frozenSuggestedUsers: [],
       moveChoiceUp: null,
       moveChoiceDown: null,
       close: null,
diff --git a/web/input/input-state.js b/web/input/input-state.js
--- a/web/input/input-state.js
+++ b/web/input/input-state.js
@@ -8,7 +8,7 @@
   type MediaMissionStep,
 } from 'lib/types/media-types';
 import type { RawTextMessageInfo } from 'lib/types/messages/text';
-import type { ThreadInfo } from 'lib/types/thread-types';
+import type { ThreadInfo, RelativeMemberInfo } from 'lib/types/thread-types';
 
 export type PendingMultimediaUpload = {
   localID: string,
@@ -36,6 +36,7 @@
 
 export type TypeaheadState = {
   +canBeVisible: boolean,
+  +frozenSuggestedUsers: $ReadOnlyArray<RelativeMemberInfo>,
   +moveChoiceUp: ?() => void,
   +moveChoiceDown: ?() => void,
   +close: ?() => void,