Yep I recognise this.
Put antirattle springs on both sites (upside and downside) of the pads.
The pads on the caliper has to much play for 1 spring because of wear.
If you do that the pads keep in a central place and can't rattle.
Another solution is to find springs that are a bit bigger and push the pads a bit more up.
You also can place the springs in a wrong position.(see first pic)
That also will stop the rattle.
And if you buy a compleet kit you find this for the outside pads and is a modification
Stupid enough they didn't make it for the inside pads, but on the other hand there isn't much space on the inside for it.