alt-tab not working after left mouse click

[Xuong Tran Trieu]

Ubuntu 20.04.1 LTS

Steps:
1. Click left mouse
2. Wait for ~1 second
3. Press and release Alt + Tab

Actual: Stay on the same window/task/application
Expected: Change to another window/task/application

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: udev 245.4-4ubuntu3.3
ProcVersionSignature: Ubuntu 5.8.0-36.40~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-36-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
CustomUdevRuleFiles: 70-snap.snapd.rules 70-snap.snap-store.rules 70-snap.canonical-livepatch.rules
Date: Tue Jan 12 17:08:41 2021
InstallationDate: Installed on 2021-01-09 (3 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
MachineType: Dell Inc. Latitude 5410
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-36-generic root=UUID=669124d8-c9e0-4fd0-a562-a35d8545db4c ro quiet splash vt.handoff=7
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/09/2020
dmi.bios.release: 1.4
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.4.2
dmi.board.name: 06KF2W
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.asset.tag: 701428
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.4.2:bd11/09/2020:br1.4:svnDellInc.:pnLatitude5410:pvr:rvnDellInc.:rn06KF2W:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: Latitude
dmi.product.name: Latitude 5410
dmi.product.sku: 09A0
dmi.sys.vendor: Dell Inc.

[Nick Rosbrook (enr0n)]

I do see this behavior on Focal still, but I don't think systemd is the correct package.