I got 2 of the mentioned routers. When I enable wlan adapter, the router becomes unstable, slow, and it hangs after few seconds. When wlan is disabled, the board works fine.
I installed ROS 6.7 and upgraded to 3.10 firmware. Both of the routers came from the same batch and had problems out of the box. Other boards work normally.
EDIT: I tried the ROS 6.8RC1, the issue remains.