True. We don't make the playfields we just restore or recoat them.
The insert ghosting is something that occurs below the surface of the work performed and it is a matter of how well the initial factory surface is bonded.
I have over 25 years experience as a autorefinisher coupled with 15 years restoring playfields and machines.
That stated I have learned to accept insert ghosting as out of my control even though it is disappointing.
As an auto refinisher we had two different methods for painting either metal or plastic.
Knowing that this is where I see the flaw in general playfield production.
The type of pretreatment and process needed for the lens/inserts should be different than the process for wood in theory because paints and coatings easily absorb into wood but they are much tougher to bond to plastic.
Plastic cleaners,and primers are made to deal with this and must be used for the best bond even if you cannot appreciate it at the time it is a longevity consideration.
With the lenses already in place before they are screened and coated there is no way there is an independent process for each surface.
Without a way to do or address that then it is always a bit of a gamble and there seem to be time periods where it is more problematic than others.
WPC 95 is a period for Williams and it looks like the latest run of Sterns is now that equivalent.

I am not really familiar with GOT gameplay or layout but my best guess is that there are more air balls on that side of the game or general use there.
The use and impacts are going to compromise the poor insert adhesion quicker than lighter use and little to no impact but even that is a broad statement because it could flex more in some places when pulled into service positions.
The main issue with all ghosted inserts is poor insert coating adhesion and it going to vary from game to game and playfield to playfield.