DT12 Trans Drops into N when I come to a stop?

I have a 2016 Wetsern Star, DD15 with a DT12 in it...
Has been operating flawlessly, until a couple of weeks ago, I started getting overrevving between gears, not a constant issue but on upshifts it would ramp up between odd shifts, no issues on downshifts.

A couple of weeks ago I had to come to a hard stop (Nashville, rush hour!) once I once stopped the trans went into N and beeped at me, I couldn't get it to go into gear, air pressure was perfect, the only remedy I could think of was shutting off the battery for a couple seconds and when I started the truck back up, it shifted perfectly, no issues again for the next 1500miles, the over revving did continue.

Monday, when I was delivering my load, the trans shut down again and I repeated the process of powering off and it worked, this happened almost every time I came to a stop.

I am completely at a loss as to what it could be and would really appreciate any help with the issue.

 

No not raining? which sensor do you have any idea? have you had this problem?

 

I did have an idiot stereo guy try and fix my radio and he completely messed things up, but that was all in my overhead, he left bare wires cut and I couldn't get interior lights, lane departure, high beams, window power... any chance that he could have screwed up a sensor doing that?

 

SPN 520970 FMI 7