Kenworth T880 41% Torque

I have a 1 year old T880 and occassionally get an issue that seems to happen either from a stop or when i slow down to an almost stop.

I stomp on the gas pedal and the torque gauge stops at 41% and i crawl until eventually the problem corrects itself (usually within 15-30 seconds). if i let off the pedal and stomp on it again, 41%. this can happen a few times a day, or sometimes goes away for a few days and comes back.

i've tried turning off engine brake, engine fan, cruise control, LIM, PTO. i've recently discovered that if i tap the break pedal, that fixes it.

while this is happening, no lights or warnings, all fluids and temps are good, on flat ground so its not a power issue, the transmission is shifting fine and since i'm only getting 41% its not a too high or too low rpm issue.