I edit huge projects on Lumafusion 3.0. I might be pushing LF a little hard on my 2020 iPad Pro
File issues I've encountered...
I have clips on the timeline that I edited and played back fine, then a few days later its a black screen with no audio. The thumbnail is black with a "no entry" sign icon. In Lumafusion the info was there: framerate, resolution, audio. going into the FILES app, these clips are Zero KB or just a few MB. The clips are distributed throughout the timeline.
Freeing up unused files removed ALL the footage from just ONE of my current projects - the project is there, but the media isn't. OUCH. I'll copy those again to the imported footage folder. Fingers crossed.
The importing now seems to append a -1 to file names, eg "movie-1.mp4". It started doing that only recently. Not an issue, but I'll have to rename those hundred or so MP4s to match.