did a short flight to test on vulkan
tried to tune different VORs across the route, worked just fine
did an ILS approach at destination, worked just fine.
maybe you are experiencing a scenery issue? corrupted navdatabase?
note: my big wish (and awaiting patiently for the update) is captain Jan to tweak and release the FM update for xp11 to behave as it did on xp10 days. Such a joy to flight and how it behaved during rotation, flaring, etc.