The oddities of operations not covered by data sheets seems to be endless. During my early investigations into DCC I believed the statements (from various sources including Peco) that points were all DCC ready. It quickly became evident that the frogs(of any type) must be isolated on their exit joints or problems will arise. Whereas the the DC control gives rise to a spark as a loco passes the DCC gives rise to a powerdown (error message) or worse - return to default address!
This now takes no time to recognise and almost less to remedy as there are now reprog tracks all over the place.
The power downs are more of a nuisance because when using the Select walkabout there is no immediate evidence of a problem except lack of movement but eventually the loco address LCDs flash. It still means a trip to the Elite to make the reset. Equally I have yet to discover how one operates points or functions from the Select ( it is simple enough if the Select is the only controller), at present it seems to be a simple loco speed and direction unit which ignores the acceleration and decel settings and even stop at times!