You are a TEPer regardless of your citizenship status, as a note. Probably moreso than most of us.
That being said, I’m going off this list here. Since you aren’t listed as a Citizen there, I can’t recognize you as one. You should speak with @Mangegneithe (Discord: mangegneithe) to see if an error was made, as it is him who deals with Citizenship matters.
If I were to guess, however, your citizenship under the Concordat was turned to normal Citizenship when honorary Citizenship was abolished, and then removed when we switched to Voter Registration. If you applied for Voter Registration then you should be a Citizen at present and so an error may have occurred, but nonetheless Mangegneithe has the final answer on that.