Mavros subscribers reset

Mavros changes topics where he sends data. I have no idea how it is possible however when drone is not moving Raspberry Pi 4B gets all data via UART connection (if I subscribe topic in my code it gets updated). However while drone is moving connection breaks. After looking deeply into rpi it seems as mavros changes “place” where publish messages. ( rqt data updates normally hovewer code breaks). Is it possible that mavros resets and publishers changes its destination?

I have no idea where is the problem. Should I reconfigurate pixhawk or mavros just sometimes breaks and i should be prepared for this?

Data goes via UART with baud=921600

Have anyone encounter such a problem?
Thank you!