If the NDB is on the (current!) map and/or in the AIP, and is not Notamed to be U/S or withdrawn, then it should be working. Otherwise it's a flight safety issue and you should not post about it on this forum, but write to the CAA about it.
But I have to agree that strange things happen sometimes. There's a DME "FRT" in the Netherlands (co-located with the RR NDB) which hasn't been printed on the "official" ICAO map for years now. But it is on the Jeppesen VFR map, it's also in the AIP and when we tried to use it a while ago, it worked just fine. It's also not part of any SID or STAR. A real mystery DME that only Jeppesen seems to know about.