SOLVED: Jellyfin becomes unresponsive when transcoding

[TheDreadPirate]

I did try to transcode to ramdisk instead and while I couldn't get quite far enough in the movie where it would usually freeze (before running out of ram), a new tab did load. So there must be something with the access to the SSD. I tried upgrading my SMB share to v3 and connected my PC straight to the same switch as the server, bypassing the router, to see if something would change but got the same behaviour. I have other docker containers that occasionally want to access the SSD like HA, but surely that shouldn't be noticeable?

Just to be clear, the SSD is local, right?  The SSD containing your docker directory is NOT an SSD over SMB?