I got the same issue in the middle of the gaming process. I was doing diablo 4 boost. The problem was in my USB port, I have just switched to another one and it worked.
You may try:
Try to rollback the firmware update: If the issue started after updating the firmware, try to rollback the update if possible. You can do this by going to the device manager, right-clicking on your keyboard, selecting properties, going to the driver tab, and selecting "Roll Back Driver".
Try a different USB port: If you're using a USB keyboard, try plugging it into a different USB port. Sometimes, certain ports can have issues that others don't.
Check for conflicting software: Sometimes, other software can interfere with the operation of your keyboard. Check to see if you have any other keyboard-related software installed that might be causing a conflict.
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