I had the same issue with my Liteon LVW-5045. This is due to some cable companies and sat feeds may set the CGMS flag/bit for certain programs or channels and the version of firmware (203) I UPGRADED (sarcasm) to was coded to honor this flag. I solved my problem by returning to an older version of firmware (201) available for my model. Never had a problem since. I learned two good lessons. 1. If it isn't broke, don't try to fix it. & 2. Newer doesn't necessarily mean better.
I am not familiar with the 5027 so before you try to downgrade your firmware (if available / possible) someone needs to confirm if this is even possible so you don't brick your unit.