@DaveFromBoca 

Good day.

Thank you very much for your time and patience.

Sorry for the delay.

Since I have seen that you posted three threads and for the TP-Link router, do you have Deco M9 plus?

If yes, have you tried the beta firmware listed here:

Deco M9 Plus_V1: https://static.tp-link.com/2020/202009/20200917/Deco_M9Plus_V1_1.4.3.zip

Deco M9 Plus_V2: https://static.tp-link.com/2020/202009/20200917/Deco_M9Plus_V2_1.4.3.zip

For the RE650, after you update the beta firmware, then configure the RE device to re-associate the front-end through the web page Quick Setup (Tether is not recommended).

Please note:

Our Range Extenders use Auto security mode by default, which supports WPA2+AES, and TKIP to be compatible with the devices that only support old encryption methods. If the Apple devices detect that the wireless connection a weak encrypted network,  'the weak security' would show up there. But in fact, IOS devices would still prefer the secure encryption method WPA2+AES, instead of TKIP when connecting to the range extenders, and users do not need to worry about the potential security issue.

Thank you very much for your understanding and support.