My pellet grill WiFi (2.4 & 5G) will only connect to my router by using guest mode. My router is a two-year old TP-Link Deco XE75 Pro 3 pack mesh. This is the first issue I've had with this router. Pellet grill company says it must be something in my router blocking the normal connection. No one else is having this issue. Does anyone have a clue what setting in my router could be blocking the signal to my router the normal way but yet the guest mode works?