Me, we have an iPhone 7 and another iPhone 7 Plus, both with problems. Typically what is happening is a 10-minute Wi-Fi authentication failure.
The connection remains active but there is no data exchange with the router or AP.
In my case, the failure occurs with the AP (EAP225).
The AP Log shows the following messages:
Client *** failed to connected to AP:xxxx with SSID "***" on channel 40 because WPA authentication times out/failure (2 times in a minute).
This started to happen after the update to iOS14
VitorD
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Ribeirão Preto - SP, Brasil