Yes, obviously not that automatically 
. I placed a message here No automatic ROCK update from 254 to 256, though running with UEFI on NUC8.
roon says it’s only UEFI/HDMI related because before 256, HDMI ports won’t be recognized on some UEFI machines. This manual update can be done easily. And I had no issues at all with 256.
I think it’s worth a try.