Worked wonders until it didn't – Moonlight-Video Editor By InstaSize Review

Have only had the App a few weeks. Now trying to brighten an iPhone Timelapse video that 0:27 seconds. Tried six times. Each time after adjustments, when I go to "share/save" app gets 60% through processing video and crashes. Deleted App and reinstalled. No luck. Keeps crashing. Not a memory issue or storage issue-have 68GB left available in phone storage. Is it cuz it's Timelapse. Moonlight please advise or fix. Want to love the App but such a waste of time if it keeps crashing after changes without saving them. For now it's a 2-star until it's fixed.
Review by DJ Sarge on Moonlight-Video Editor By InstaSize.