apparmor denies sendmsg to /run/systemd/journal/socket

While debugging why Polari can no longer connect to IRC servers after an upgrade to Ubuntu 17.04, I noticed the following errors in my journal:

    Bal 27 18:05:56 platonas audit[4869]: AVC apparmor="DENIED" operation="sendmsg" profile="/usr/lib/telepathy/mission-control-5" name="/run/systemd/journal/socket" pid=4869 comm="mission-control" requested_mask="w" denied_mask="w" fsuid=1000 ouid=0

(repeated many times)

I also see

    Bal 27 18:05:56 platonas mission-control-5[4869]: (process:4869): mcd-WARNING **: got error: Account idle/irc/mgedmin0 disconnected with reason 3

so somehow log messages from mission-control-5 still make it, despite the denied journal connection (via syslog maybe?).

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: telepathy-mission-control-5 1:5.16.3-2.1ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
Uname: Linux 4.10.0-20-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
CurrentDesktop: GNOME
Date: Thu Apr 27 18:16:08 2017
InstallationDate: Installed on 2016-09-10 (229 days ago)
InstallationMedia: Ubuntu-GNOME 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160720)
SourcePackage: telepathy-mission-control-5
UpgradeStatus: Upgraded to zesty on 2017-04-14 (13 days ago)