Hello, I’m a Brave user since the end of March and I had this issue 2 or 3 times I think.
I simply get disconnected from every websites every 1 month / 1 month and a half.
The option to erase cookies when leaving brave is not enabled.
I don’t do anything in particular for this to happen, I simply open Brave one day and when I try to access a website I often use I notice I’m disconnected, and same goes for every website.
Here is my version of Brave Version 1.11.97 Chromium: 84.0.4147.89
Edit: I get security emails from websites each times as every connections is considered made from a new device, even though I was connected the day before