Thanks, Paul! I did some more fiddling to reproduce this, and I figured out it's actually a specific USB transceiver. Whenever I have a Microsoft Nano Transceiver 1.0 (as packaged with the MS Mobile Mouse 6000, for example), this happens in tumiki-fighters.
Looks like possibly a udev issue or something with the usbhid driver, although I haven't encountered it anywhere else.
(Apparently this transceiver exhibits finicky behaviour in Windows, too, so maybe it's Microsoft's fault).
Thanks, Paul! I did some more fiddling to reproduce this, and I figured out it's actually a specific USB transceiver. Whenever I have a Microsoft Nano Transceiver 1.0 (as packaged with the MS Mobile Mouse 6000, for example), this happens in tumiki-fighters.
Looks like possibly a udev issue or something with the usbhid driver, although I haven't encountered it anywhere else.
(Apparently this transceiver exhibits finicky behaviour in Windows, too, so maybe it's Microsoft's fault).