wifi tcp transmission drops: error 104 connection reset by peer

[abcdcadb]

I use the tcpiperl to test speed and operation of tcp transmission, some time and especially highly frequently occurs when ble is enabled at the same time is, wifi automatically drops, tcp cannot send (sent byte is -1) and return error 104 connection reset by peer. At that time, my pc couln't ping esp32 IP (192.168.4.1) even they were in the same network.

This situation even cannot be fixed if I leave and join wifi of esp32, only one way to get rid of it is reset esp32.

Any one faced this or have any recommendation?