Celluloid freezes the system on launch

[KristijanZic]

Overview Description: Opening any video with Celluoid flatpak on Ubuntu 20.10 freezes the whole system and requires the user to turn of the machine by shutting down the power from the machine.

flatpak info io.github.celluloid_player.Celluloid

Celluloid - GTK+ frontend for mpv

          ID: io.github.celluloid_player.Celluloid
         Ref: app/io.github.celluloid_player.Celluloid/x86_64/stable
        Arch: x86_64
      Branch: stable
     Version: 0.22
     License: GPL-3.0+
      Origin: flathub
  Collection: org.flathub.Stable
Installation: system
   Installed: 29,7 MB
     Runtime: org.gnome.Platform/x86_64/41
         Sdk: org.gnome.Sdk/x86_64/41

      Commit: cda2578c5300f65cabd2e6223355b4c5b9446ca2ca8e3a04cdd797b61acd83d5
      Parent: 8da8c3d3ff52881aa2a6d58824aca415017f63e4d08c585d476de5dd6aa79997
     Subject: Update yt-dlp.git to 2022.02.04 (623ce298)
        Date: 2022-02-05 22:46:31 +0000

OS: Ubuntu 21.10 x86_64 
Kernel: 5.13.0-28-generic 
Uptime: 7 mins 
Packages: 1823 (dpkg), 63 (flatpak), 44 (snap) 
Shell: bash 5.1.8 
Resolution: 1920x1200 
DE: GNOME 40.5 
WM: Mutter 
WM Theme: Adwaita 
Theme: Adwaita-dark [GTK2/3] 
Icons: Yaru [GTK2/3] 
Terminal: gnome-terminal 
CPU: AMD Ryzen Threadripper 1900X (16) @ 3.800GHz
GPU: AMD ATI Radeon RX Vega 56/64 
Memory: 6560MiB / 15848MiB