Just to add info if it helps, I tried every single 2.5 template there was and every combination of unchecked antilag and launch control and the results never changed. Maybe the MP one cut out a little softer. I even set all the launch control and antilag to max RPM and 0 degrees of timing. Always acts up at 3800 RPM. Seems like an antilag because reving in Park you can hear the turbo spooling up when it happens.
Burned a stock Cal and works perfectly. Maybe someone has a known working 2.5 TSBEC Cal they can post I could try? Maybe an older version of TSBEC?
Edit: I tried a Tsbec version 3 and is working good so far.