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Could be a problem with your keyboard maybe? Test out if your keyboard is working fine or not.
I think your kb is getting disconnected. check your cable or maybe the keyboard itself.
is it actually bluetooth or 2.4 ghz wireless? coz if it's Bluetooth, just get a wired keyboard a 2.4 wireless keyboard.
maybe ur accidentally switching ur pcs language
Do you get low fps on your system?
Discord