HTTPS using BearSSL

I am using BearSSL (BearSSL - API Overview) library in my ESP8266 to implement HTTPS via GPRS module A6. The BearSSL get callback functions for TCP Read and TCP Write.
Every time (during TLS handshack) when the server sends me wired message the bearSSL stuck. The hexa data of the server message to me is: 15 3 3 0 2 2 46 ← the weird message
I am not sure what is that message. All I can say that the server sends it after I sent him Client Key exchange + change cipher suite + encrypted handshake message.
Can you explain what does this weird message means ?
I have never see header starting with 0x15