Animate didn't register progress after a file overwrite

[Allison36772262z2gi]

I've been working on an animation and I came to a point where I clicked "saved as" to rename the file and overwrite a previous version. There was a pop-up which even clarified whether I wanted to overwrite the file and I clicked OK.

Just before closing my computer, I clicked save just in case. I opened it in the morning and everything looked normal. However, the program was frozen and glitched out so I had to close it. When I reopened the file, everything after what I assumed to be the time I overwrote the file the night before hadn't registered. I looked through my files, and all of them said last changes happened around 11pm, even though I saved my final version around 2am.

Hours of work on an assignment are gone, I can't find any information on this specific problem and don't understand what went wrong. Is there a way to retrieve it, or a way to avoid this again?

[kglad]

do you have auto-recovery enabled?

[Firewood：D]

Unfortunately! This is a known bug.
Progress is lost after saving.
Everything works fine when saving, but nothing happens when opening the file the second time.
The author of this link has been following it for several years, so there is enough evidence that this is a serious bug.

 https://tieba.baidu.com/p/7676430880# 

[kglad]

@Firewood：D 

are there steps that reproduce it?

[Firewood：D]

It cannot be reproduced. It is a random event and cannot be traced, but it definitely exists.

[kglad]

ok.

and another reason to save frequently with increasing version number appended to the file name.