Works but wobbles strongly

The adapter I have installed at one point on which I do not often umstecke something. Both channels come through unhindered. What almost a little surprising me because bomb stuck the 3.5 mm plug in there not just - even fairly loose, I'd say. Has also something wrong.
I ordered 4 pieces and there are only slight differences in this respect.
So if you want the adapter much "use" or relying on a strong hold of the plug in the socket should rather reach for a better model.