I've come to the conclusion the switch dislikes some types of router. Whether it may be software or hardware, I have made progress on wired for example by exchanging hardware in my network. It would not be a shock if wireless is similar. In my experience it hated my buffalo router, but loves my netgear just fine. Both have dd-wrt. No idea why it happens. So maybe if possible try using it on another router for wireless. Maybe take it to a friend's house or borrow from the neighbor.
