greylist entries in mail.log cropped

[mindrunner]

Referencing this issue: docker-mailserver/docker-mailserver#1276 and reusing its title.

We are having the problem, that

For all entries in mail.log from greylist the date-time-identification is missing at the beginning of each greylist-line.

See second line in snippet:

Sep 26 12:16:55 nyx postfix/smtpd[2334]: warning: 181...
action=greylist, reason=new, client_name=marry.xxx.com, client_address=134....
Sep 26 12:16:55 nyx postfix/smtpd[2334]: NOQUEUE: reject: RCPT from marry...

Any advice where to start looking?