I have also tried to disable all hardware access making a pure software firmware.
I understand there are more tasks in the system to manage TCP/IP.
What I do not understand and I don't like is that the cpu of esp32 must not be too loaded to work correctly. Unfortunately the load depends on external ...

Thanks for your reply.

In the case there is some problem in my code I agree with you. Watchdog could help to find the problem.

Here the hypothesis (I don't know still if correct) is that a ESP32S3 must have some (I don't know how many) free cpu time to manage internal things. Without this free ...

Hello,
I read this interesting post.
I'm using
- ESPIDF4.4.6
- ESP32S3 board (240MHz)
- SPIRAM (40Mhz)
and I have a similar problem.

I use :
- wifi station (not access point mode)
- i2s
- spi triggered by a timer.

I have disabled WDT, background work (tcpip) on core 0, i2s and spi on core 1.
Try ...