Why is it asking for a detailed explanation for Form 1116 (COPY 1) Line 3b? I have foreign taxes on mutual fund inc only and this is being caused by a contrib to my HSA.

I claimed a foreign tax credit on my original return. I am now amending my return because I made a contribution to my HSA in 2022 for 2021 but I made it after filing my return. Anyway, when I simply added the HSA contribution, which is a  Schedule 1 deduction (line 13), TT pushed me into a review where is wants me to enter a detailed description for Line 3b of Form 1116 (COPY 1).  I can't even see what changes were made to the Form 1116 so I'm not sure what is happening.