I just pushed a fix to master [1] that fixes this issue. Unfortunately it turned out rather invasive, so it needs active backporting to 1.4.
The main part is to switch ProcXTestFakeInput to use GPE/GKVE, and flip the device to the last-used slave device.
[1] 105d28652d1fb80dd8ce8511e2605dccc8812e99
I just pushed a fix to master [1] that fixes this issue. Unfortunately it turned
out rather invasive, so it needs active backporting to 1.4.
The main part is to switch ProcXTestFakeInput to use GPE/GKVE, and flip the
device to the last-used slave device.
[1] 105d28652d1fb80 dd8ce8511e2605d ccc8812e99