Jitsi meet lagging on Kubuntu

Hi all,
I was using Jitsi on my Windows machine but then decided to switch to my Kubuntu 19.10 installation on a laptop so I could move more easily.
Apparently while the video stream was running smooth on Windows, on Kubuntu it lagged a lot, although it was connected to the same wifi, and even while having more download speed than in Windows.
What is the problem? Is it with the OS or with Jitsi?

OS: Kubuntu 19.10
CPU: 2x Pentium T4300 @ 2.10 GHz
Mem: 3.8 GB