T800/CM2250 intermittent dead pedal/low rpm

[BRUDER01]

Heres an odd one-

CM2250 in a 13 T800.

When loaded rounding a corner with quite an aggressive lean (30mph) the pedal goes dead for about 3 seconds and the rpm's drop down into the 3-400 range for a blip and then everything comes back to life.

This will only happen in the two tightest corners of my 12 hr loop, its now happened 3 days in a row getting progressively worse. The first day barely noticing to today noticing a real issue.

No codes-

I inspected batt leads where they cross over or around any sharp points expecting a bare spot- found nothing (did not cut all ties and pull all looms apart yet)

Opened weather seal connectors going through fire wall, no moisture, no dirt.

Anyone have a similar experience? Suggestions on where to go next?
21,000Hr truck.

Thanks.