Xcode 15, Apple Watch and iPhone Simulator, Simultaneously

I am trying to run the watch and iphone simulator at the same time. I have removed all simulators using Xcode Devices & Simulators panel and created a single iPhone with a paired Apple Watch to eliminate as many variables as possible. I have two schemes, my iPhone app scheme and a Watch scheme. The Watch is NOT set to run independently. My problem is that I can not start the iPhone simulator and the watch simulator and debug both at the same time. As soon as I start one or the other the currently running process is killed, making it impossible to debug both at the same time. I feel like I had this working at one point so I'm not sure if this is a regression or not. Using Xcode 15.1.