Create and use AN ADDITIONAL Brave Browser user Profile (Menu --> More tools --> Add profile) - only ← meaning: Do not have any other Brave Browser user Profile tabs/windows open.
When creating this new Brave Browser user Profile for test purposes
Do not import anything.
Do not add any extensions.
Do not allow/enable any Brave Browser “bells and whistles” such as Brave Rewards, Brave Talk, etc.
IF this test Brave Browser user Profile does not present your problem, then possibly, the profile that you have been using, has a problem . . . and that might be caused by one or more extensions, or too many tabs ← complex/conundrum.
Detailed info about testing - IF, in regard to memory and performance issues:
I had this happen some time ago randomly, around the same time I lost my sync chain from my desktop to..the chain. But then one Brave update later, it came back.
It’s ironic though the GitHub post is closed months (more than half a year honestly) before I ran into the issue (which I think was only just a few weeks ago). No solution was provided to me until it just came back on its own after an update, which clearly re-wrote some corrupt file.
@ste_wilko I was simply pointing out that the issue had occurred before and should have been resolved. I will reply back here when I hear back from the devs about this.