I think there’s something going on. Have you spoken with your doctor?
The β-hydroxybutyrate produced in fat-burning mode is supposed to heal IBS, by tightening the juctions between cells. That should help the acute inflammation, and the lowered insulin should also help reduce systemic inflammation.
I can’t think of an explanation of the increased uric acid and lower B12 and iron, however. That sounds concerning, hence why I suggest speaking with the professionals. Perhaps your doctor and dietician will simply say to wait it out, but in your situation, I’d want to be hearing them say it, not just assume that things will work out.
In any case, the best of luck in getting everything sorted. Please keep us informed.