Currently running 6.7.2. Started seeing this issue after upgrading to 6.7.0 and then rolled back to 6.5.1. However, I still saw the issue occasionally on the older version. I'm not sure which docker is crashing - I run Plex, Radarr, Sonarr, and binhex-Sonarr and others . Every 1-3 days I see 100% CPU load and dockers not responding and I need to restart the array. I think it is probably Plex that crashes based on a Reddit thread I saw. From Reddit I understand that most people are able to role back to 6.6.x and not see the issue, so the fact that I still saw the issue after rolling back to 6.5.1 is surprising to me given how similar the symptoms of my issue are to this thread.
All of my /config paths map to /mnt/user/appdata .
I noticed binhex-sonarr has a /data path mapped to /mnt/cache/appdata/data. Seems like a bad idea. I'm not sure what that path is for, the other Sonarr docker doesn't have it and it's my only docker mapping pointing at the cache drive. I've stopped the docker for now to see if it helps.
I'll capture the diagnostics when I hit the issue on 6.7.2, I just updated.