OpenPlotter – Labels Disappearing and System Freezing After a Few Hours

[instructdeep]

I’ve recently set up a fresh OpenPlotter installation, and at first everything runs perfectly. However, after some time, odd things start happening:

• First, labels on certain widgets vanish. For instance, my true wind speed widget loses its “TWS” label after roughly an hour (though the timing varies).
  
• Then, after 2–3+ hours of operation, the whole system freezes — data stops updating completely.
  
• A restart (power off/on) brings everything back to normal.
  

The NMEA bus itself seems fine, since my B&G instruments connected to the same network continue showing correct data.
Has anyone else run into this problem? Any ideas on a fix?