This question already has an answer here:

Happens very rarely, perhaps once a month or so, but definitely in the scenario described above.

Has been around since Mojave.

I run uBlock Origin on Safari.

Mail.app is usually always open when this occurs.

Can someone make some sense of this?

marked as duplicate by nohillside Jul 5 at 11:23

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Browse other questions tagged .