Lightroom Classic tethered capture autofocus problem

When using tethered capture with my Canon R5 I need to enable autofocus on the camera so I can use the focus controls in the LIVE video mode. I often need to do this if the camera is high up on a camera stand in my studio and I am fine tuning the focus manually. However when I trigger a capture from the keyboard the camera autofocuses before it triggers the shutter and that often changes the focus because the focus square on the camera may be somewhere else in the frame from where I want the critical focus. 

Why does Lightroom behave like this? Capture One does not do this if I trigger a capture from the keyboard when the camera is set to autofocus so I know it's not a limitation of the camera. Furthermore, I have the camera set up with a back button autofocus set up so that triggering the shuter release does not have anything to do with focus, so why does Lightroom not respect this? The only way Lightroom will capture a frame without focussing first is if I have the camera in manual focus mode, but then I can't change the focus in the live view screen. Useless, if the camera is out of reach. 

I wish Adobe would get more serious about tethered capture and professionals, for example I with I could place a layout overlay on the live view screen and move it around, I wish I could zoom in the live view to check focus at 100% etc.