I've tested upgrading cups-daemon package to version 2.1.3-4ubuntu0.3 on KVM, LXD and Virtualbox and I haven't found any issues so far.

Testbed specs:
1. KVM - Xenial 16.04 / qemu-system-x86 1:2.5+dfsg-5ubuntu10.14
2. LXD - Xenial 16.04 / lxd 2.0.10-0ubuntu1~16.04.1
3. Virtualbox - Xenial 16.04 / virtualbox 5.0.40-dfsg-0ubuntu1.16.04.1 / Extension_Pack-5.0.24

Upgrade results:
[KVM]
root@xenial:~# apt policy cups-daemon
cups-daemon:
Installed: 2.1.3-4
Candidate: 2.1.3-4ubuntu0.3
Version table:
2.1.3-4ubuntu0.3 500
500 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages
*** 2.1.3-4 500
500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
100 /var/lib/dpkg/status

root@xenial:~# lpstat -t
scheduler is running
no system default destination
device for Dummy: http://hostname:631/ipp/
Dummy accepting requests since Thu 24 Aug 2017 03:27:51 PM UTC
printer Dummy now printing Dummy-1.  enabled since Thu 24 Aug 2017 03:27:51 PM UTC
	Unable to locate printer "hostname".
Dummy-1                 unknown           1024   Thu 24 Aug 2017 03:27:51 PM UTC
Dummy-2                 unknown           1024   Thu 24 Aug 2017 03:27:56 PM UTC
Dummy-3                 unknown           1024   Thu 24 Aug 2017 03:27:59 PM UTC

root@xenial:~# apt install -y cups-daemon 1>/dev/null 2>&1 && echo ok
ok

root@xenial:~# apt policy cups-daemon
cups-daemon:
Installed: 2.1.3-4ubuntu0.3
Candidate: 2.1.3-4ubuntu0.3
Version table:
*** 2.1.3-4ubuntu0.3 500
500 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages
100 /var/lib/dpkg/status
2.1.3-4 500
500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages

[Virtualbox]
root@cups-vb:~# apt policy cups-daemon
cups-daemon:
  Installed: 2.1.3-4
  Candidate: 2.1.3-4ubuntu0.3
  Version table:
     2.1.3-4ubuntu0.3 500
        500 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages
 *** 2.1.3-4 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

root@cups-vb:~# lpstat -t
scheduler is running
no system default destination
device for Dummy: http://hostname:631/ipp/
Dummy accepting requests since Thu Aug 24 17:41:19 2017
printer Dummy now printing Dummy-1.  enabled since Thu Aug 24 17:41:19 2017
	Unable to locate printer "hostname".
Dummy-1                 unknown           1024   Thu Aug 24 17:41:19 2017
Dummy-2                 unknown           1024   Thu Aug 24 17:41:25 2017
Dummy-3                 unknown           1024   Thu Aug 24 17:41:33 2017

root@cups-vb:~# apt install -y cups-daemon 1>/dev/null 2>&1 && echo ok
ok

root@cups-vb:~# apt policy cups-daemon
cups-daemon:
  Installed: 2.1.3-4ubuntu0.3
  Candidate: 2.1.3-4ubuntu0.3
  Version table:
 *** 2.1.3-4ubuntu0.3 500
        500 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     2.1.3-4 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages

[LXD]
root@juju-efafba-0:~# apt policy cups-daemon
cups-daemon:
  Installed: 2.1.3-4
  Candidate: 2.1.3-4ubuntu0.3
  Version table:
     2.1.3-4ubuntu0.3 500
        500 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages
 *** 2.1.3-4 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

root@juju-efafba-0:~# lpstat -t
scheduler is running
no system default destination
device for Dummy: http://hostname:631/ipp/
Dummy accepting requests since Thu Aug 24 15:48:41 2017
printer Dummy now printing Dummy-1.  enabled since Thu Aug 24 15:48:41 2017
	Unable to locate printer "hostname".
Dummy-1                 unknown           1024   Thu Aug 24 15:48:41 2017
Dummy-2                 unknown           1024   Thu Aug 24 15:48:44 2017

root@juju-efafba-0:~# apt install -y cups-daemon 1>/dev/null 2>&1 && echo ok
ok

root@juju-efafba-0:~# apt policy cups-daemon
cups-daemon:
Installed: 2.1.3-4ubuntu0.3
Candidate: 2.1.3-4ubuntu0.3
Version table:
*** 2.1.3-4ubuntu0.3 500
500 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages
100 /var/lib/dpkg/status
2.1.3-4 500
500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages