I've been having issues where I'll be working on my animation and opentoonz will change the timings of my frames, move them around, or will delete frames or bring back old ones. For example, I'll be working on in-betweeing the frames 100-200 and then scroll down to see my key frames (using key frames as the term, in opentoonz I kept them as normal frames) and I'll see that a frame holds for much longer, or two have been switched positions, a frame I deleted will have reappeared, or most annoyingly the there will just be a section of frames deleted.
At first I could get most of them back by typing in the next frame numbers and they would pop up again, but now I only could get 3 frames back that way and if I try to type the next higher numbers, after that it says they don't exist. I'm pretty unfamiliar with how saving in opentoonz work, since being able to bring a frame "back" after deleting it isn't something I've encountered in other programs. Is there a way to stop this deletion? And a way for me to look at the storage of all my frames? Working on a project where the frames are gradually deleting themselves without being able to be brought back by typing their number back in is pretty frustrating.