After playing osu! for some time, the keys on the left of my tapping keys (in this case: Z and X) start to actuate at >80% at the lightest press. This happens only in this case, and the rest of the keyboard works just as normal without playing the game. If this happens, the issue can be temporarily fixed by unplugging and replugging the keyboard, but starts happening again during the next osu! session.
No modifications done to the keyboard besides replacing the stock keycaps with XDA keycaps and switching the C and V keys to Lekker45.
Attached is a video demonstration of the problem.