In one project I had an ESP32 configured both as Access Point (AP) and as a Wifi Client. Everything was fine, until I changed my home Wifi password.

After changing the home Wifi password I wanted to change the Wifi password set on the device through the Web UI I made and hosted on the device. The problem started there. I was unable to access the UI.

Reviewing the code realised that the Wifi Client is continuously trying to re-establish the connection in a loop. And hence is unable to process the incoming request and process the page.

So either need to stop the scanning from time to time or stop the scanning when an AP client is connected. For short and fast resolution I stopped the wifi connection retry when a client is connected to AP.

WiFi.softAPgetStationNum()