Ubuntu 24.04, Thunderbird 128.1.0esr (64-bit) I have a mix of POP and IMAP accounts. All are read when starting Thunderbird, I receive the messages. But then, only the IMAP accounts get the messages, whatever the configuration of the Server Settings. I.e. no messages for the POP accounts from "Check for new messages every X minutes", nor from "Get Messages". I have to restart Thunderbird to get the new messages for the POP accounts. Everything worked well before, this problem happens since I have upgraded Xubuntu from 22.04 to 24.04, where the Thunderbird package switched to a mandatory Snap, where it upgraded to 128.1.0.