I am having the exact same issue with Melio. We've been using Melio for years and all of a sudden the addresses have started disappearing for many of our vendors that we have paid many times in the last few years. How can we recover them without having to re-add all disappearing addresses? My current fear is when 1099's roll around we will have to do a lot of data entry that was not expected in an already busy time of year. Thank you!