mumctl messages -f doesn't show previous messages

[Lykos153]

Currently I observe the following behavior:

• mumctl messages -f outputs no message but waits for new ones.
• mumctl messages, invoked right afterwards, however, shows all the messages since login

Expected behavior: mumctl messages -f shows all messages since login and then waits for new ones. Maybe the output could be limited with a --tail n option to only show the last n messages.