clicking on the Pitch Mode icon is switching the interface from Cintiq to iMac screen.

Here’s the issue I’m running into with SBP – when I click on the Pitch Mode icon at the top of the screen, it immediately moves the SBP interface from my Cintiq over to my iMac.
Anyone know why this is happening? Or how to fix it?

I’m using SBP 5.5, a Cintiq 27, a 2015 iMac