Yeah, it seemed to come back to life when I rebooted the computer. However, I'm still having a couple of issues that might be completely unrelated to anything here. First, Dolphin doesn't seem to want to launch anything properly if emulation was stopped since the program was restarted, so I can run a game and quit it, but if I want to run it again or run a second game, I need to restart the whole of Dolphin. If I don't, it just freezes and burns a whole lot of CPU doing nothing. This only happens with Wii games and with Passthrough enabled, so I'm guessing that when emulation is ended, it's leaving the adapter in an unhappy state. Secondly, for a while I had it stop tracking the cursor when pointed at a region of the screen. I'm guessing that's just because my sensor bar started life as literally the cheapest available on Amazon in about 2010, and it's not got great coverage.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT