I've had this problem appear in all firmware updates. I've had some type of bug or two with the app on the RC+ since It came out. Most recently last week on a job, latest edition firmware, just after take off, app stopped responding. I think the software in the RC+ is buggy still, sometimes it hangs during recording and will not stop REC with the hard button or by tapping the screen. Sometimes it will not quit an intelligent mode when you try to return to normal. I'm not sure if the processing power of the RC+ can handle all write, cache, and app functions at once. I've noticed more issues when shooting 4K than when shooting 1080p. Sometimes all that works is landing and rebooting aircraft and controller. Not so PROFESSIONAL like the model would say.