Yes, it’s most likely a bug then.
To all the other comments:
You are blowing this up way out of proportion.
No, VORs don’t get inaccurate the longer they have been erected due to changes to local magnetic variation. VOR’s receive maintenance regularly like all those navaids out there and any necessary changes are updated frequently with each AIRAC. Regarding the OP’s problem, all this doesn’t even matter because he provided a situation in which his actual position was remarkably deviating from a published radial. It doesn’t matter if he took magnetic variation, wind vectors or all the fancy pseudo-scientific discoveries you posted meanwhile into account.
No matter how he got there: His CDI shows him on a specific radial which appears to be 5° off that very radial when shown on a map. Unless these maps are using a terrible projection causing such a deviation within only 15 NM distance, there is no room to assume much else than a misconfigured VOR. The North direction (maybe currently suffering from an error in the local magnetic variation database) of that VOR needs to be corrected. Then, this problem will be gone.
Edit: I noticed that the deviation is allowed to increase up to 6 degrees before the VOR station is required to receive the necessary maintenance to “reset” it to the current magnetic variation. So this could indeed be erroneous in the real world right now and we would have to wait for an additional deviation of the sixth degree before it will me corrected in real world and then (hopefully) also in the MSFS database.