Evolution sometimes discards text when inserting signature into reply

[Ben Klein]

When I try to reply to a message in Evolution (version 3.12.7-0ubuntu1), I fill in the reply text and then a signature block. Upon doing the latter, however, the text sometimes disappears and is replaced by the signature block instead of having the signature block inserted at the cursor's location.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: evolution 3.12.7-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-30.40-generic 3.16.7-ckt3
Uname: Linux 3.16.0-30-generic i686
NonfreeKernelModules: wl
ApportVersion: 2.14.7-0ubuntu8.1
Architecture: i386
CurrentDesktop: LXDE
Date: Tue Feb 17 11:58:02 2015
InstallationDate: Installed on 2015-01-17 (31 days ago)
InstallationMedia: Lubuntu 14.10 "Utopic Unicorn" - Release i386 (20141022.1)
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: evolution
UpgradeStatus: No upgrade log present (probably fresh install)