Hi Memoric,
I experienced the same issue, 15-30% shift of the Libra y-axis started a few days ago, I've had to keep SimAppPro visible in order to recalibrate. Switching the usb port appears to have rectified the issue for me, but I will have to fly a bit more to verify if it worked. There was some talk of usb issues on the motherboard I am using (Gigabyte x570 Aorus Master 1.1, bios F33a).