[ljm]

Same deal if you remap the key in Windows using the PowerToys utility. Only, it'll happen whenever something pegs the CPU.

Never had the problem when using SharpKeys to rewrite the registry.

[chrismorgan]

Yeah, back when I was using Windows, I had RAlt mapped to Compose with WinCompose, and RAlt would get stuck occasionally when the system was under significant load, so I’d need to manually disable WinCompose, tap RAlt to clear its spurious down state, and then enable WinCompose again.