I have 3 ASI cameras and trying to get Trains setup for them in StellarMate 1.7.7

The cameras are a 533MC and 1600MM with the 120mini as the guide camera.

Setting up the guide camera in the Optical Train for each camera and selecting the Camera and take a picture works as expected.

however, the guide tab image is not showing the 120mini but is showing either the Primary or Secondary camera, whichever is selected.

I can set the 120mini as a main camera, removing from guide setup and it works fine.