Antigravity ctrl z clears all the file content?

After ai made some edit.
I go to the file.
I press ctrl+z ctrl+y undo redo to try to see some older versions of it.

Then boom.
All the other files ai edited go complete blank.
Did anyone encounter this before?

PS:

I often need to compare the works AI did with previous version.
I have git set up but i dont want to git branch every time i make some changes.

I occasionally use the restore point feature.
Which is unsafe but convenient in some cases.