Key light-up sometimes "hangs" until reset

[Encythe]

Anytime I press a key, there is a non-zero chance that either the key press or the key release will not be caught by KeysPerSecond, it can occasionally "lag" slightly, too.
I have a full n-key rollover keyboard, which means ghosting is not the main problem.

I'm unsure what's causing this, so I would appreciate any help you could give me.
I am on Windows 11 24H2 26100.3775, running Java version 8 update 441.

A gif for reference.

This is also similar, if not the same problem, to an older issue #69.

[RoanH]

Interesting, you're right in that this is probably not a keyboard hardware issue. It seems like keyboard events are just extremely delayed or completely lost, which I haven't seen happen before. Since you're still on a relatively old Java version it is possible that switching to a more actively maintained JRE might help (e.g., I personally use Eclipse Temurin 17 or 21), but this is also nothing more than a wild guess.

[Encythe]

Made the switch to the actively maintained JRE, however, the issue persists.

[RoanH]

Hmm, then I'm out of ideas at the moment unfortunately... It doesn't seem to be a known issue with the native library I use for key input handling either. I'll try to investigate some more and maybe do some extra testing on Windows 11, but I don't have any good leads at the moment (and also limited time).