Somethings wrong with my file again, video included

[Romanpen]

So i keep having the same issue with my file. I'm not sure If i'm putting too much information into one symbol, but i'm having trouble with animation forming black rectangles and generally looking like i'm staring through a paine of broken glass? At first I started just putting animation onto different layers. ( I genreally set all the animation of one character, puppet and all) into a symbol, then letting it play once throughout the movie to stop this same issue from happening. But now its back. Words fail me to describe exactly how it looks, so i took a screen recording (sorry the audio from the animation is so loud, I tried to re-record but then the problem just went away for some reason?) 

Has anyone experianced this before? And why does it seem to stop after scrolling up and down the timeline a few times?

I'm running 23.0.1

[n. tilcheff]

These look like screen refresh issues to me, not a corrupted file.

You should restart the computer and possibly have fewer other programs / browser tabs open while you work on the animation.

If it happens very often, you might want to split your movie into separate FLAs or see if there are updated graphics card drivers available.

All in all this seems rather harmless, but just in case keep saving versions of your project as you go to prevent potential data loss.

[Romanpen]

Thanks, and actually I found a very simple solution. I just stopped using "view grid mode" 

Went right back to normal......I had thought it was something like what you're talking about but Ive had much bigger files in flash before so I didn't think it had something to do with processing power, then I realised I never left the grid view on while animating either.

[kglad]

do yo mean view > grid > show grid caused some problem?

[Romanpen]

yes. I it definately slowed it down. Now that ive taken it off I have not issues with lag or screen refreshing. 

I also noticed that when I'd zoom out really quick with grid on it would seem to get exteremely small in comparason to the stage, which is expected....but it just seemed a LOT finer than you would expect, and seemed almost warped in some areas...although this may have been an optical illusion. 

[Romanpen]

I'm still using grid to help draw, but when I'm scrolling through the timeline I simply take the off.