It’s definitely related to the Chrome issue linked above (https://issues.chromium.org/issues/378017037).
I’ve been running lastest version of Brave on my Raspberry Pi 5 for 10 days and the difference is drastic. I go from tabs crashing every 60 seconds to maybe 1 tab crash every couple days… Which is the same frequency I see on older versions of Brave.
I’ve modified my Brave desktop shortcut to include the run flag I listed above, so the workaround is seamless on my end.
Edit: Source for my work around is listed here: https://issues.chromium.org/issues/378017037#comment28