Hey I posted a thank you but never saw it appear in the thread. That was exactly the problem. Thank you

Brilliant! Thank you I had missed that detail and you are 100% correct. That is some interesting behavior by the internal receive buffers. Before the change: I (782986) Large_Upload_Test: Recieving 1600 bytes in chunk, total bytes received: 0 I (782996) Large_Upload_Test: Writing bytes 0 through 159...

I have been working on a project that uploads data to the ESP32 http server. I have found that, above certain sizes, the mechanism does not properly buffer the incoming data - or at least that is what I think is going on. When the CPU starts I can see the message: "I (306) wifi: Init static rx buffe...