Funny enough I found the bug. The cache settings had somehow changed to a zfs raid0 of 4 devices instead of the 2.
I had to manually go into the cfg file and change value from 2 to 1. Don't understand why upgrading to RC3 or RC4 would make my config invalid though. Glad it works now.
I've tried looking into the settings and config but I dont see any immediate errors that would result in this. Things are running fine on RC2.
arcana-diagnostics-20230430-1518.zip