I have two xbee WiFi modules sending serial data to each other in transparent mode, UDP, infrastructure. One module is the old S6 and the other is the newer S6B firmware version 2024. I configured the Access Point (AP) to work in "n" mode only. After some time (3 to 5 hours) the newer one gets disconnected to the AP while the older S6 still works. Any idea of what could be happening?.