gnome-terminal maximize then un-maximize shrinks one pixel

[Matze]

If I open a new terminal ('ctrl-alt-t' or from the run menu), then maximize and un-maximize i get odd behavior. maximize does fine, but then clicking the 'un-maximize' does restore the terminal window to the previous size *minus* 1 pixel in each horizontal and vertical.
If i repeat that, each time the terminal size shrinks by 1 pixel.

I'd expect that it return it to the size it was before maximize.

I found a similar bug in "Bug #1521302" from a few years ago

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-terminal 3.36.1.1-1ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed May 6 09:05:32 2020
InstallationDate: Installed on 2020-04-30 (5 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-terminal
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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

[Yibo Cai (cyb70289)]

Met with exactly same issue after upgrading from 18.04 to 20.04.

[Yibo Cai (cyb70289)]

Find a workaround in this link: https://gitlab.gnome.org/GNOME/gnome-terminal/-/issues/129

Run below command and restart gnome-termianl, works for me.

dconf write /org/gnome/terminal/legacy/headerbar '@mb false'