MMM (and MMP) cogging/hesitation when warm?

[bdebde]

Latest 1.32 on the MMM, I think... the MMP may have been a bit older, 1.28 maybe. Everything works fine at first, usually ok for 5 or 6 min qualifiers, but towards the end of a 10 min main, if car stops it hesitates to get going (jerks and doesn't take off smooth) and sometimes needs a push to get going. I also notice some intermittent hesitation at low throttle as well.