I received the @all notification, although I'm not in the channel

This is strange... Maybe best to schedule a test with @jbpasquier to get logs?

I just checked, and Prosody considers you a member of that circle. Were you previously a member?

@MattJ Yes I was

This looks like a DjangoLDPNotifications issue, it doesn't listen for post_delete on subscribers.. opened issue here: djangoldp-packages/djangoldp-notification#25 (closed)

Efficient!

This should be fixed now. Please reopen if it is not the case.

closed