stats: Error: FIFO input error: CONNECT: Duplicate session ID

[Urban Loesch]

Hi,

yesterday I updatet to Dovecot EE version 2:2.2.23.1-1.
Now sometimes I see this errors in my logs:

...
Apr 18 09:02:19 dovecot1 dovecot: stats: Error: FIFO input error: CONNECT: Duplicate session ID NjcCDoSAFFd/KQAAFMUCeg for user user at domain1.com 
service lmtp
Apr 18 09:04:05 dovecot1 dovecot: stats: Error: FIFO input error: CONNECT: Duplicate session ID rjV1HtCGFFcoogAAFMUCeg for user user at domain2.com 
service lmtp
Apr 18 09:04:30 dovecot1 dovecot: stats: Error: FIFO input error: CONNECT: Duplicate session ID Sqi0IMWAFFeRNQAAFMUCeg for user user at domain3.com 
service lmtp
...

The error only appears when a mail is sent to 2 ore more recipients concurrently.
It's not ciritcal for me, all mails are getting delivered correctly.

Thanks and regards
Urban Loesch