I use auto-encrypt for simple chit-chat and manual encrypt for anything important. I have had a few vendors report that they were unable to read or unecrypt my message. Something is obviously going on. I've seen a few other reddit posts mentioning similar things. Beware.
I have a buyer acct. that I can test this with, but I'd rather not mess with auto PGP even on a throwaway. Just stop using it and encrypt it yourself please!