SIM & SD Card Tray Issue!

I assure you, it’s designed this way, probably to make it easier to align and close. Both my Xperias have the same design. That wobbly piece is connected loosely to the tray in two places.

Is there any way you could post a picture of the phone with the tray inserted as you have it, and a picture of the tray outside the phone with your SIM card installed, matching the one I posted above?

If it previously didn’t wobble, it’s probably just that the piece was pushed in a bit farther to the tray, and then it got loosened at some point… to revert to its natural state.