Agreed. But that appears to only cause multiple increments which, as said, was anticipated. It is the port value falling back, the received requests becoming out of order, which appears to be most symptomatic of something having gone wrong.Firefox makes other requests in the background too (DNS, network connectivity checks etc) which will interrupt the continuity.
I am suspecting Firefox does always send with increasing port numbers, that it's LwIP or related which is dropping some requests or retries, delivering some to my code out of order.
I am in the process of adding some MicroPython support for looking at LwIP statistics in the hope that will help reveal what is going on.
Statistics: Posted by hippy — Wed Feb 21, 2024 2:37 pm