I have a lot of account signed in on Chrome and Brave. However, all those signed in accounts on different websites got logged out after a recent update. I had to log them back in one by one. I am not sure if this is related to kwallet? I had it disabled on my Plasma. Should I enable it to prevent this from happening again?
Yes, that is where your login passwords are saved, disable it, you will have to login to every site every restart.