Glitches

Its a really great app with lots of things to use ( Im an instagram editor). But recently I have been making videos and after a while it starts to glitch and. The screen goes black, the audio gets messed up, and the video length gets messed up. PLEASE fix this It is extremely annoying. Ive had to remake a video 3 times now

RainbowCookiez7 about Cute CUT Pro, v1.8.5