same thing happened to me as well.. happened twice already within 24h..
E5 2697 V4
Huananzhi X99 F8
4 x 16GB Samsung ECC REG 2400Mhz
8 HDD array
4 x 1TB NVME raidz1 cache (Converted from Raid10 btrfs on 6.11.x) on pcie bifurcated card
running a few docker images, unifi controller, chia full node..
See if there's any clue.. been rock stable since 6.9.x..
chakuserve-diagnostics-20230618-1714.zip