pitivi crashed with ValueError in __transcoderDoneCb(): list.remove(x): x not in list

[APolihron]

it's stuck at 5% and if you will tryy to not use transcode the error will apear but it will still transcode files

ProblemType: Crash
DistroRelease: Ubuntu 16.10
Package: pitivi 0.97.1-1
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
ApportVersion: 2.20.3-0ubuntu7
Architecture: amd64
CrashCounter: 1
CurrentDesktop: MATE
Date: Fri Aug 19 01:12:01 2016
ExecutablePath: /usr/bin/pitivi
InstallationDate: Installed on 2016-08-18 (0 days ago)
InstallationMedia: Ubuntu-MATE 16.10 "Yakkety Yak" - Alpha amd64 (20160727.1)
InterpreterPath: /usr/bin/python3.5
ProcCmdline: /usr/bin/python3 /usr/bin/pitivi
PythonArgs: ['/usr/bin/pitivi']
SourcePackage: pitivi
Title: pitivi crashed with ValueError in __transcoderDoneCb(): list.remove(x): x not in list
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/x86_64-linux-gnu/pitivi/python/pitivi/utils/proxy.py", line 308, in __transcoderDoneCb
     self.__running_transcoders.remove(transcoder)
 ValueError: list.remove(x): x not in list
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip libvirt lpadmin plugdev sambashare sudo

[Launchpad Janitor (janitor)]

[Expired for pitivi (Ubuntu) because there has been no activity for 60 days.]