Dock location moves dock to wrong screen

[Jack Micklethwaite]

When my laptop is on its dock there is an option to select which monitor has the application dock. Selecting my external monitor moves the dock to my laptop's built in display and selecting built-in display moves the dock to my external monitor.

Description: Ubuntu Eoan Ermine (development branch)
Release: 19.10

gnome-control-center:
  Installed: 1:3.34.0.1-1ubuntu2

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: gnome-control-center 1:3.34.0.1-1ubuntu2
ProcVersionSignature: Ubuntu 5.3.0-13.14-generic 5.3.0
Uname: Linux 5.3.0-13-generic x86_64
ApportVersion: 2.20.11-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 4 13:04:00 2019
ExecutablePath: /usr/bin/gnome-control-center
InstallationDate: Installed on 2019-10-04 (0 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Beta amd64 (20190926.1)
ProcEnviron:
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
 PATH=(custom, no user)
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)