diff --git a/react/features/mobile/call-integration/middleware.js b/react/features/mobile/call-integration/middleware.js
index 965fb3eb9..03378815a 100644
--- a/react/features/mobile/call-integration/middleware.js
+++ b/react/features/mobile/call-integration/middleware.js
@@ -264,6 +264,11 @@ function _conferenceWillJoin({ dispatch, getState }, next, action) {
     const handle = callHandle || url.toString();
     const hasVideo = !isVideoMutedByAudioOnly(state);
 
+    // If we already have a callUUID set, don't start a new call.
+    if (conference.callUUID) {
+        return result;
+    }
+
     // When assigning the call UUID, do so in upper case, since iOS will return
     // it upper cased.
     conference.callUUID = (callUUID || uuid.v4()).toUpperCase();