ok there is a bit of miss here, you are saying the master bath floor works, but not the bedroom?
as I understand it, there are 3 zones, lvroom, kitchen and bedroom/master bath. My zone 3 starts just around the bed (the end facing the front of coach) and goes all the way to the end of master bath next to engine bay access door.
So need to know which zone is the issue? if only part of the zone 3 is working, that 'COULD' be wiring under the tile. It can happen.
Also, I haven't looked at floor heat settings thru omniscope. Thats why asked for SL floor heat config settings. 'sometime' SL gets picky if the config settings/names are not right. it may help to know how your floor heat zones are defined.