Hello, @alvarolb
Apparently, we discovered the origin of the BUG.
Everything indicates that using FreeRTOS + Thinger ( thing.start(); in core 0) and calling thing.is_connected() in core 1 (very frequently) causes some access conflict, which generates the SSL error.
This leaves a question: do we need to do some blocking when we call the thing object in the loop of core 1? We will discuss this in a specific topic.
Thank you very much for your feedback.