After you wrote this I went back to play around with how I could get these expenses limited. What I did wasn't intuitive but it seems to accomplish what I wanted. 

I checked the box that says "Allocate all mortgage interest, real estate taxes, and mortgage insurance premiums (if applicable) as excess when claiming the standard deduction (Pub. 527 Worksheet 5-1)"

Once I did that the effect was that ProConnect made a negative expense adjustment called Disallowed Vac. Home Exp. to reduce net profit to zero but not allow a loss.

Now I have 2 carryovers to 2025 - the disallowed vacation home expenses and disallowed vacation home depreciation with a break even schedule E for that property.

Doesn't make sense to me what checking that box did this, but he is taking the standard deduction so it seems right.