diff --git a/app/src/main/java/com/nextcloud/talk/chat/ChatActivity.kt b/app/src/main/java/com/nextcloud/talk/chat/ChatActivity.kt
index 6aa43f4f1..78544e5db 100644
--- a/app/src/main/java/com/nextcloud/talk/chat/ChatActivity.kt
+++ b/app/src/main/java/com/nextcloud/talk/chat/ChatActivity.kt
@@ -2114,7 +2114,8 @@ class ChatActivity :
             typingTimer = null
             typedWhileTypingTimerIsRunning = false
 
-            for ((sessionId, _) in webSocketInstance?.getUserMap()!!) {
+            val concurrentSafeHashMap = webSocketInstance?.getUserMap()!!
+            for ((sessionId, _) in concurrentSafeHashMap) {
                 val ncSignalingMessage = NCSignalingMessage()
                 ncSignalingMessage.to = sessionId
                 ncSignalingMessage.type = TYPING_STOPPED_SIGNALING_MESSAGE_TYPE