Brave Browser and ProtonMail Bridge "forget" credentials from time to time

Hi!

I’m not sure how to explain this, but occasionally, between reboots, applications like Brave and ProtonMail Bridge forget credentials. I’m experiencing this ever since this other problem Hyprland (with UWSM): no secret service available on login (kwallet is installed but it won't start and autounlock)

I’m not sure how to start debugging this.

I open KWallet Manager, and I see folders there, but they sometimes lack content: