I'm having the same issue with a vendor that has multiple addresses for 1099 (legal address) & payments (billing address).  I found comments on this same issue dated from 2018. That's really disappointing this issue hasn't been resolved.

Copying & pasting when making payments is only opening a door for mistakes & errors when mailing to hundreds of different vendors every month. It's extremely disappointing to even offer that as a solution! This seems to be an easy fix & would certainly appreciate to see this resolved very soon.