[SOGo] client disconnected during delivery of response for

[Mark]

Greetings.

I'm using sogo-5.10.0 with nginx. The webmail runs fine, however each time
I refresh my webmail homepage, the following line appears in my sogo's
error.log and the log file grows dramatically.

Jul 16 13:21:08 sogod [19994]: [ERROR] <0x0x9f26ebcbd28[WOHttpTransaction]>
client disconnected during delivery of response for
<WORequest[0x0x9f1c57b5408]:
method=POST
uri=/SOGo/so/L0RCj6JNvE.klywJwA9fZLCJ5dBGpcKmLqa8oXH6QZI-/Mail/0/folderINBOX/expunge
app=SOGo rqKey=so
rqPath=L0RCj6JNvE.klywJwA9fZLCJ5dBGpcKmLqa8oXH6QZI-/Mail/0/folderINBOX/expunge>

(len=51): the socket was shutdown

Any clue would be much appreciated.
Regards,
Mark.