Not what I expected, good thing you managed to get it solved!

That dump didn’t reveal any particular useful information, however it seems like multiple people are reporting issues with mesa + segfault, e.g. https://bbs.archlinux.org/viewtopic.php?id=301550

Mesa v24.3.2-1 in Arch should revert that issue, Mesa v24.3.1 seems to be the problem one

You could check the backtrace of one of your crashes

coredumpctl debug
> bt

And then dump that trace here

It might be related to Mesa/GPU drivers