Having an issue with with stalling. When coming to a slow stop, car seems to hold desired idle. when I bring speed down quickly and bring the car to a stop, it drops below desired idle rpm, drops down to about 500, tries to catch itself and will die. I am not aware of any other quick decel issues and this only happens with the clutch in at a full stop

I have tried to slow down decay rates in TC and TF but it doesn't make much difference other than now when it does catch, the idle hangs slightly.

All other parts of the idle are fine with no hunting, and smooth engine accel.

Appreciate any suggestions.