Well I feel a bit stupid now The OP mentioned"Had MTH WiFi out and DCC package was good at 14.2v on my DC voltmeter setting...)
Not being very familiar with the MTH Explorer, I inferred that it has DCC and DCS control (like some MTH Locomotives do). At first, I didn't want to respond at all, but after a while there were no replies to the original question, so I thought I'd just offer a "wild guess" in the hope of getting someone more knowledgeable about the Explorer to jump in and help. I guess maybe that's something.
At this point, I'm going to take a step back and let the experts continue to ponder this mystery. Thank you for your assistance.