NAG1 TCC slip cannot be set below 15rpm

[[email protected]]

I've tried multiple solutions but Desired TCC Slip is always set to 15rpm and can't be lowered. I even set TCC apply /release to all gears except 1st to 0 and still desired slip stays at 15rpm no less

[Pablito[PL]]

Same situation with mine setup, but no one responded.
:/