ES450 not powering off after 4.9.3

I just updated Aleos from 4.8.0 to 4.9.3. Now the modem won’t turn off.

I have the power wired as recommended, with +24V Constant to the red wire, and +24V switched to the white (either +24V or open).

With 4.8.0, after removing power from the white wire, the modem would power down within 60 seconds. Now, it has stayed on for excess of 30 minutes.

Thanks in advance for any input!

Update: I downgraded to 4.8.0, and the modem turns off as expected. Updated to 4.9.3 again, and the modem won’t turn off.

Will