Minimised window vanishes and can't reconnect

Start Remmina, connect to an RDP session then minimise the window. The minimise animation works as normal but afterwards the window icon disappears from the unity launcher. Selecting same connection in the notification icon menu shows the "connecting" message then dies. You have to kill remmina to start again.

You can minimise the window using the window buttons, or the big orange down arrow provided by remmina, the outcome is the same.

This must be a regression as it worked earlier this year.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: remmina 1.0.0-4ubuntu3
ProcVersionSignature: Ubuntu 3.16.0-50.67~14.04.1-generic 3.16.7-ckt16
Uname: Linux 3.16.0-50-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.18
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Oct 29 16:51:18 2015
ExecutablePath: /usr/bin/remmina
InstallationDate: Installed on 2015-07-13 (108 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: remmina
UpgradeStatus: No upgrade log present (probably fresh install)