When creating a message and adding a list of addresses to the BCC fields and maybe one is missed, accidently, Copy/Paste will not transfer an address nor can you use the original method to redo all addresses nor add just one more. Nothing will take place. The only method I have found is to delete the original message and start over, being very careful to include all the addresses you want. TIA, CU L8R, 'e'
This seems to have been fixed in 3.12.0, since I can normally copy&paste any text into any address field in Compose window.