Weird “sticky input” in League — TAB and Space don’t release instantly

Hey everyone, I’ve been dealing with a really annoying issue in League of Legends and I’m hoping someone here has seen this before.

Sometimes when I press TAB to check the scoreboard, the panel stays open even after I release the key. Same thing with Spacebar when I use it to lock the camera — it keeps the camera locked as if I’m still holding the key down, even though I’m not.

It feels like input lag or that the key release isn’t being detected. What’s weird is that this mostly happens in League. Normal typing doesn’t show any issues.

Things I’ve tried so far:

• Turned off Sticky Keys / Filter Keys in Windows
• Disabled Discord / Nvidia / Steam overlays
• Switched USB ports
• Disabled V-Sync in the game
• Updated drivers
• Tried low latency mode in Nvidia control panel

Still having the same problem.

Has anyone experienced this kind of sticky input in League specifically? Any idea if this is a keyboard issue, a Windows setting, or something with the League client itself?
Any advice would be appreciated!