Continuing the discussion from Align nav data to 3rd scenary:
actually the reason is simple, few people worry about high accuracy ever since fsx\p3d
that is why for lovers of accuracy, resources such as FSX/P3D Navaids update and https://www.fsaerodata.com/support/airac-cycle created
so you wanted an example you got it:
paid 3rd party scenay SKBQ by pksim is used with wrong ILS course (40) and possibly slightly wrong runway coordinates as well, and we see a noticeable offset relative to the runway axis
and
important, that in both cases the plane in flight uses your nav base and LOC fly with the correct course (48) aligned with the true runway