Selecting "mutiny" layout has caused the panel to gain a large margin

[Lucy Llewellyn]

Fresh install of Ubuntu Mate 18.04. Chose "mutiny" layout from mate-tweak (so this might be a mate-tweak but not mate-panel) and the panel is now correctly placed, but with a large right-hand margin making it appear too wide/twice the correct width.

Screenshot: https://cloud.bowlhat.net/index.php/s/Tg7qSwpE2LE39Ht

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: mate-panel 1.20.1-3ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: MATE
Date: Fri Apr 27 16:28:52 2018
InstallationDate: Installed on 2018-04-27 (0 days ago)
InstallationMedia: Ubuntu-MATE 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: mate-panel
UpgradeStatus: No upgrade log present (probably fresh install)

[Lucy Llewellyn (lucyllewy)]

I've managed to get to the correct state by variously switching between hidpi/lodpi and cycling through a few different panel configurations, with the last one before it became unbroken being cupertino. I can't now reproduce the problem again to find a causal scenario. Sorry :-(

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Launchpad Janitor (janitor)]

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