This is some NG(not good) boards from factory, in fact, they just lose antenna, no other issue, easy to fix.
I upgrade some into IPX socket. Very easy, and looks like wifi signal is better than the blue antenna. Of course the IPX antenna is much bigger 🙂
PS: I do not know the exactly name of such socket, just watch the picture.
Better to use some glue, two pads are not that stable.