Wow, I upped mine to $15K and see what you're talking about now.  I tried negative entries on Screen 25, no luck.  I even tried adding a non-income-tax state like TX and sourcing the distribution there, but it still didn't take it off.

I think you'll need to call support and see if they can submit it for fixing.

I can see why it's flowing that why, like you said, the software presumes you'd submit for reimbursement from your HSA right away.  But that's not ideal HSA tax optimization.  Let it grow, invested tax free!  🙂