Window is cut off.

[laichiaheng]

(1) Issue/Bug Description:
The right hand side of window is cut off.
It doesn't happen every time.

(2) Steps to reproduce (if you know):

1. Open a window
2. Open MPV player in full screen by default.
3. Close the MPV player when video is over by default.

(3) Expected behavior:
It isn't cut off.

(4) Distribution (run cat /etc/os-release):

NAME="Manjaro Linux"
ID=manjaro
ID_LIKE=arch
BUILD_ID=rolling
PRETTY_NAME="Manjaro Linux"
ANSI_COLOR="32;1;24;144;200"
HOME_URL="https://manjaro.org/"
DOCUMENTATION_URL="https://wiki.manjaro.org/"
SUPPORT_URL="https://manjaro.org/"
BUG_REPORT_URL="https://bugs.manjaro.org/"
LOGO=manjarolinux

(5) Gnome Shell version:
3.38.1

(6) Pop Shell version (run apt policy pop-shell or provide the latest commit if building locally):

Name            : gnome-shell-extension-pop-shell-git
Version         : r578.a11d3c3-1
Description     : Pop Shell - Tiling window management in Gnome (WIP)
Architecture    : any
URL             : https://github.com/pop-os/shell
Licenses        : GPLv3
Groups          : None
Provides        : None
Depends On      : gnome-shell  pop-shell-shortcuts-git  dbus-x11
Optional Deps   : gnome-shell-extensions: native-window extension for improved window placement
                  [installed]
Required By     : None
Optional For    : None
Conflicts With  : gnome-shell-extension-pop-shell
Replaces        : None
Installed Size  : 841.07 KiB
Packager        : Unknown Packager
Build Date      : Sat Oct 17 20:50:04 2020
Install Date    : Sat Oct 17 20:52:19 2020
Install Reason  : Explicitly installed
Install Script  : Yes
Validated By    : None

(7) Where was Pop Shell installed from:
AUR

(8) Monitor Setup (2 x 1080p, 4K, Primary(Horizontal), Secondary(Vertical), etc):
1 x 1080p

(9) Other Installed/Enabled Extensions:
cpufreq GameMode GSConnect KStatusNotifierItem/AppIndicator Support Pamac Updates Indicator Sound Input & Output Device Chooser User Themes

(10) Other Notes: