I have found that there seems to be a esp-sdk version mismatch when we directly download esp-idf on github compared to the PIO version wherein there still exists unstability to use ESP32 Async Webserver in STA+AP mode.
To compare the code works perfect on Arduino : idf version: v3.3-beta1-328-gabea9e4c0
vs PIO : idf version: v3.3-beta1-179-ge931fe9f5-dirty. Did anyone is aware of this issue/knows how to fix?
Directions would be appreciated!