Thanks for the hint. But this I was already aware, and it happens for example also with GPIO21 (totally uncritical pin). I have the impression, since only the first time it runs correct, something will be stored in the ESP32, that leads to the different behavior with the second run, and I hoped ther...

I use ESP32 to run servos. Always during upload the servos have uncontrolled movments (connected to GPIOs), so I desided to use an relais, to switch the power supply of the servos on, during setup routine of code, so during upload the servos have no power, so I avoid the uncontroled movements. So I ...