Ever since 2020 I there has been an infuriating bug whereby the history timeline just disappears randomly. I’ve never experienced this before 2020. I thought it was fixed in 2021, but it’s just happened to me now(I’m on latest 2021.1.1)
It just happens mid session with no warning or apparent reason. I can’t reproduce it because it’s completely random.
This has nothing to do with loading/saving undo history and my undo prefs are set to default 10K undos and 8gb per subtool.
For whatever reason it always seems to leave exactly 2 undo states/bars in the history.