PYNQ: PYTHON PRODUCTIVITY

Problem with disconnection of jupyter notebook

Hi,I am now using ultra96 v2 pynq with sdcard v2.5 image.
When I use multi thread to read camera frame and feed the frame to deep learning model in real time,the jupyter notebook often disconnected and my PC can not do anything to reconnect the board.
I have to reboot the board and it took me a lot of time.
Does anyone have the same issue as well?
Tim