That’s surprising - I would not expect removing/reinstalling the app to make a difference. Is it possible there’s another explanation, such as a certain amount of time elapsing or some other action you’re taking?
In any case, I’m afraid this is probably not something we can easily address - it’s likely either a bug in the toolkit Anki is built on, or in macOS that the toolkit is somehow managing to trigger. The fact that it comes and goes could mean that the issue is sensitive to the state of the machine, such as what happens to be in memory at the time.
Some things you could try:
- the latest beta version, which uses an updated toolkit: Anki 2.1.55 Beta 3+
- the slower Intel version of Anki, either Qt5 or Qt6