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If the length of the blade is an exact match to a VATS key then there's an issue with the "mechanical cut" done by the shop. If the key was cut on a "letter blank" key that only matches the key-way then the blade isn't long enough for the key cuts to see the pins/tumblers.
VATS key blade is maybe 37.5mm +/- from head and a "letter blank" is something closer to 30mm +/-. The effective length of the 6 cuts is the same but overall length wouldn't allow function.
Generally a "work-key" is the only key done less the resistance feature and is brass. If VATS is disabled a key with any resistance feature would work if the mechanical cuts were correct. The "work-key" is much softer material and I'd think not a good choice for everyday use.
That was the exact cause of the problem (the length of the non-VATS key). A bit of filing of the shoulders on the key and it works.
Thanks
JR