I also experienced the same issue using Ubuntu 18.04 and VLC 3.0.8 version.
(Nvidia-driver-435)
I was not able to reproduce the same issue with another media player.
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I'm having the same issue on Ubuntu 18.04.
python3 --version
Python 3.8.1
sudo apt-get install python3-gi
Reading package lists... Done
Building dependency tree
Reading state information... Done
python3-gi is already the newest version (3.26.1-2ubuntu1).
0 upgraded, 0 newly installed, 0
