Chris A,
The Track Mobile uses a TMCC board, not Legacy. Perhaps there is a voltage difference in the TMCC compared to Legacy boards.
The Track Mobile is selling new between $324 and $350 on Ebay There are two used ones at or under $200.00 which is not a good sign for a brand new release to sell so cheaply.
Thank you for your input. I will call the dealer tomorrow. Lionel Service is backed up and can't get to my three H-10 Steam Engines for a while and their warranty is up in December 2019. My 1931260 Challenger #3985 is at Lionel now.
Sincerely, John Rowlen