Seems to have gotten stuck again well before the bed was cooled fully...
SENT: XYZ_@3D:8
RECEIVED: WORK_PARSENT:0
RECEIVED: WORK_TIME:0
RECEIVED: EST_TIME:0
RECEIVED: ET0:205
RECEIVED: BT:89
RECEIVED: MCH_STATE:27
RECEIVED: PRN_STATE:5
RECEIVED: LANG:0
SENT: XYZ_@3D:8
RECEIVED: WORK_PARSENT:0
RECEIVED: WORK_TIME:0
RECEIVED: EST_TIME:0
RECEIVED: ET0:203
RECEIVED: BT:89
RECEIVED: MCH_STATE:27
RECEIVED: PRN_STATE:5
RECEIVED: LANG:0
SENT: XYZ_@3D:8
RECEIVED: PRN_STATE:5
Note in lower-right of window still says "Cooling Down...", but, the bed dropped, I hit OK, and it's back at the Main menu.
If I go to the Machine Control Panel and click Disconnect, then, Connect, it's fine.