The Cache Mover plugin is reliably triggering a segfault in the `shfs` process for me when it tries to switch an open file from array to cache (which obviously takes out the entire array and requires a dirty shutdown).
I had it configured in 'regular' mode, and cache copy mode set to `file`. I'm guessing the issue is probably linked to this - the error in the log mentioned something like `"-" is not a valid path`. Sadly didn't think to save the log before I rebooted each time - and I'm not going to test this any further as the forced reboots are too much of a ballache.