Absurd this has still not been resolved after so much time. Ditching tp-link router and access point for an Asus.

Agree. Very disappointed I purchased this router, mesh device. Asus seems to be a better solution.

Adding a vote for this, seems pointless to have TP-link mesh devices if not usable for guest and IoT. Also it seems rediculous that IoT access point cannot also be isolated from main network similar...