C64 250407 board and reset line

[C64Retro]

Hi
I have discovered an issue with C64 250407 board revision which has the combined internal/external reset circuitry.
When a real1541II drive is attached and powered on, powering off the C64 will start the 1541II drive motor which will keep spinning. Normally on C64 poweroff the drive should not spin. In this instance, measuring the voltage of the reset pin 6 with C64 off is around 1.4-1.6 volts with reset wire attached to kernal switcher module. Removing the wire results in the voltage going to 2.8 volts which is what the voltage is on stock C64's with revisions 250407 (combined reset circuitry) and revision 250425 (separate reset circuitry). Doing the same test with the kernal module on the 250425 board (with the separate reset circuitry), the voltage is normal at 2.8 volts.
The reset wire goes to pin 6 of the pic controller and is being pulled down to the level where the 1541II is detecting a reset.
What can be done to overcome this behaviour? Look forward to a solution.

Cheers Brad