I’m also having the same problem.
When sending data with GitHub - AmbientDataInc/Ambient_ESP8266_lib: IoTデーター可視化サービス「Ambient」のESP8266/ESP32用ライブラリーと、温度・湿度センサー、心拍モニター、消費電流モニターなどのサンプルプログラムです。, it may freeze after exceeding the timeout period.
I’m using Seeed_Arduino_rpcWiFi 1.0.6.
Seeed_Arduino_rpcWiFi says “Maximum Compatible with ESP32 wifi library”, but I would like to know how the timeout processing is different.