When using 2 screens, the launcher assigns itself to the wrong screen

[w-sky]

It's simple:

1. The little marker on the left side of the launcher icons is usually full (white) when the Window of an active application is on the same screen as the launcher and the marker is thin when the Window is on the other screen. On my computer, it is the other way round.

2. The window minimize animation always zooms into the launcher on the other screen, regardless on which screen the window actually is: it's always the other.

At system settings display configuration, my 2 screens (laptop display and external monitor) are identified properly and correctly, I can switch them off and on and move their position, but the wrong launcher behavior is always the same when both screens are on.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: unity 7.5.0+19.10.20190924-0ubuntu1
ProcVersionSignature: Ubuntu 5.3.0-40.32-generic 5.3.18
Uname: Linux 5.3.0-40-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:01:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 435.21 Sun Aug 25 08:17:57 CDT 2019
 GCC version: gcc version 9.2.1 20191008 (Ubuntu 9.2.1-9ubuntu2)
.tmp.unity_support_test.0:

ApportVersion: 2.20.11-0ubuntu8.4
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity:Unity7:ubuntu
Date: Mon Mar 2 01:49:05 2020
DistUpgraded: Fresh install
DistroCodename: eoan
DistroVariant: ubuntu
DkmsStatus:
 nvidia, 435.21, 5.3.0-29-generic, x86_64: installed
 nvidia, 435.21, 5.3.0-40-generic, x86_64: installed
EcryptfsInUse: Yes
GraphicsCard:
 Intel Corporation UHD Graphics 630 (Mobile) [8086:3e9b] (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. UHD Graphics 630 (Mobile) [1043:1a81]
   Subsystem: ASUSTeK Computer Inc. Device [1043:1a81]
InstallationDate: Installed on 2020-01-20 (42 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: ASUSTeK COMPUTER INC. VivoBook_ASUSLaptop X571GT_F571GT
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-40-generic root=UUID=fe5c6775-2ed1-4039-8968-f54a713f9647 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/08/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: X571GT.305
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X571GT
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX571GT.305:bd11/08/2019:svnASUSTeKCOMPUTERINC.:pnVivoBook_ASUSLaptopX571GT_F571GT:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX571GT:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: VivoBook
dmi.product.name: VivoBook_ASUSLaptop X571GT_F571GT
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
version.compiz: compiz 1:0.9.14.0+19.10.20190918-0ubuntu1
version.libdrm2: libdrm2 2.4.99-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 19.2.8-0ubuntu0~19.10.2
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.5+git20191008-0ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.1-1ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20190815-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1