BlueOS feedback - NO Qground conexion

I am trying to move the robot using pymavlink, so I open a new udp client port to communicate without loosing qground control interface. It was working well, but for no reason the break heart at the top right corner turns red and the values of voltage and current turns to Nan. When I try to change any endpoint it is no possible because of the next error.

Finally the video is working well, I can watch it on qground, but there is not connection to it.
I already try to restart the robot and also to power off it but the problem is not solved. This problem happen to me before, so I flash the BlueOS and then it was working, but just for a couple of hours before crashing again.
Thank you for your help.

Also I tried to update the firmware and it was not successful, This is what I got.