V27.10 bounces between correct exposure to dark exposure when using a external monitor

Photoshop V27.10 has a bug that has forced me to downgrade to V27.9.1.  When I use an external monitor, the rendered image bounces between a correct exposure and one that is 4-5 stops darker.  

This seems to happen on a 30-60 second cycle.  For example, I can be in the middle of dodging an area when it will go dark.  If I stop and wait, it will go back to the correct exposure.  This doesn’t happen if I don’t use my external monitor.  When I use the external monitor the laptop is in the closed position.  So, I only see the external monitor.

My monitor is a NEC MultiSync PA271W and my laptop is a DELL XPS 15 (9500) running the latest window 11 version.  The monitor is connected to the laptop using a USB cable.

Dennis