Simulator Freezing on second debugging session

I can run the simulator for a watchface the first time and debug it etc. However, the second time the simulator will freeze / lock up. I've included a screenshot of the locked up simulator for what it is worth.  My work around is to kill the simulator and then restart Eclipse which takes a bit of time.  Does anyone know what might cause this?

Here is what I am running with:

Windows 10 - version 1909
Eclipse IDE for Java Developers Version 2019-09 R (4.13.0)
Connect IQ SDK Manager 3.1.6
Connect IQ Device Simulator 3.1.6