I’m a bit speechless right now. I’ve disabled PBO and didn’t have a single crash since then, everything’s been running fine for hours. Just to make sure that this really was the issue, I’ve enabled PBO again - but still haven’t experienced any crashes in the last hours. I have no idea how simply disabling and then enabling the feature again fixed my issue, but for now it seems like all is well.
Do you have any explanation for this weird behavior?
Anyway, thank you very much for your suggestion, looks like this actually did the trick!