I have not had low B12 or shots. I do take Folic Acid daily but that’s prescribed to counteract the side effects of methotrexate.
“Cryptic distortion” to me sounds like a fancy pseudonym for “undetermined inflammation”, but I really don’t know what it means. Regardless of what the inflammation is, your goal here is to find a treatment that keeps it in check, ameliorates it or eliminates it. Nothing else really matters. Don’t lose sight of that goal. Your task here is not to solve medical riddles, it’s to get better and stay better.