Regression bug: Mail group messages from POP3 service user

[PSi_101]

Debian 4.0
When I upgraded to 9.2.1 from 9.0, I noticed that I started getting messages from POP3 Service User with an empty subject to my mail groups. The release notes say that a bug was fixed to that effect, although i've never really noticed the bug at all in 9.0.
I've upgraded to 9.2.1 and this bug is there now.

 

[PSi_101]

Seems to happen only with Postfix. I tried reverting to Qmail and I don't the bug.

 

[PSi_101]

Isn't anyone else experiencing this bug??

 

[NateC]

Did you ever manage to get this working (with Postfix)?

I am having the same issue after going from 9.2.0->9.2.2.

 

[PSi_101]

Nope, I ended up going back to Qmail.