Laser: Min spindle speed not honored ($31)

[bottleworks]

Is anyone else having an issue with $31 not being honored (laser cutter)?
I have $30 set at 1000.
I have gone so far as also setting $31 to 1000 and it still ramps the laser all the way to 0 at the beginning and ends of cuts/engravings.
Any setting for $31 appears to be ignored.

This is for a CO2 laser, so I need a way to set a minimum power output.
I'm running V2.10_H35_2022_0621_N_ZX_001 because my laser has a Z axis, I require a persistently stored G10 L2 P1 X-600 Y-400, and I need a functioning $HZ command. The other firmware versions don't support these requirements.