Brave Search repeatedly logs out of my Premium account

Brave Search sporadically but repeatedly logs me out my Premium account after some time from all my devices. I haven’t noticed after how long this happens. It’s even difficult to notice at first. The only thing that notifies Premium is the little blue shield icon at the top right of the Brave Search page… and better search results.
No, I haven’t deleted my browser data in all this time, and no, I don’t have it set up automatically on either device.
Is this happening to you as well?