Mortgage payment reminders broken after most recent update (R46.12)

I just attempted to process the reminders for my mortgage payments next month and they're broken - the total amount is correct but in the split, everything is going to an unallocated line, nothing is going to principal or interest.

The only thing I can think that's changed is that Quicken was just updated to another version (R46.12).

Anyone see anything similar? Anyone have a suggested fix?