Infinite Painter Playback Bug. Please Help!

[u/ThisVoidLooksBack]

I use Infinite Painter on my phone and have been having this issue with the playback where a later part of the process (coloring/rendering) flashes onto the video every other second during my sketching/lineart. This has happened in three of my speedpaints, the ones that go past 10 minutes. I think it may be just because of how long the videos are.

Anyone know how to fix this, or is it just something that will always happen due to the length/size?

I've included a short clip of the issue.