When I use Studio, I’m capturing my second monitor. When you are using a dual setup, astropad will ask you what display you want to use.
SRX is finicky. I should clarify: I wish it was simple as typing in the resolution you need…IIRC, you gotta divide it by half, restart, and hope you did everything right so you get the option of 1112 x 834 HDPI, because that’s what your goal is.
Let me ask: did SRX change the resolution of your monitor change at all?