Ringing sound after key presses

When typing on my Pocket Reform’s keyboard, there’s a kind of metallic ringing sound after each key press. It sounds like there’s some springy material inside the case that vibrates. When I put my hand on the keyboard lightly it stops, but during regular typing it is quite distracting.

Anyone else having this and maybe an idea for a fix? I imagine some sort of dampening material or taping something down in there to stop it from vibrating.

Just out of interest, which switches do you have on the keys? I have not really noticed this myself yet (mine are the Choc red linear switches)

I also have the Kailh Choc Pro Red ones