24 frame animation using 2 frames died

I need a blink. I have 23 frames static, eyes closed, a 24th frame near the middle, eyes open. It was set to frame style, 110ms per frame, 207x479 images.

It worked fine for awhile, now it is broken, and Frame Animation Editor will not open for just this anim. On Props, the Frames popup won't open either. They will for others. Waited a minute in case of slow loading.

Is there a max gross # of frames on a page? I have about 36 total, that doesn't seem big.

No idea what's wrong. It took a long time to setup 23 identical frames, I really don't want to rebuild the action. Restarting does nothing.

Is there perhaps instead a way to have a simple 3 frame open/close/open eyes that runs at random intervals on page load? It'd be nice to have a random delay before time.

PS I did a lot of other work on this page that I had to scrap too - paths would not work on static graphic PNG images. It kept saying "not set".