Ramp Rate Bug

In trying to tune position PID on a tank drivetrain I added a ramp rate, when going from any number greater than .5 to any number less than or equal to .5 it would go from smooth oscillation to much smaller and very jerky oscillation, the same reaction as a Ramp Rate of 0. I have tried turning it off and on again. I’m just reporting this as a bug I noticed. I do not personally need my Ramp Rate this low.