Reverse loop modules have to be tuned to the sensitivities of the DCC command station, basically switching the polarity before the unit detects a short and shuts down.
I think that as the Select is not NMRA compliant, it may need some slightly different circuitry than the Elite. One is perhaps more sensitive than the other.
I couldn't get either the Select or the Elite to work with my 3 different reversing units that I have on my layout.