strange hard bounce rate in backend campaign stats


Active Member
I'm a little confused: when I visit Miscellaneous > Campaign Stats in the backend, my recent campaign shows an absolute fantasy hard bounce rate:

This bears no relation to the campaign stats at the "customer" end. The unsubscribe rate however is correct.

Scrolling down that entire Campaign Stats list, the hard bounce rate for all other campaigns is 0%, which isn't exactly correct either.

Can you explain this, please?