4K60FPS YouTube videos stuttering in fullscreen unless I move the cursor or Hold Fn+F3

Help
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1

I might be hallucinating, but I think I noticed this happening way too many times.
It also happened with downloaded 4K60FPS videos running through Haruna.

Is someone also experiencing it?

Operating System: CachyOS Linux
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.1
Kernel Version: 6.18.5-2-cachyos (64-bit)
Graphics Platform: Wayland
Processors: 8 × 11th Gen Intel® Core™ i5-11300H @ 3.10GHz
Memory: 9 GB of RAM (8.1 GB usable)
Graphics Processor 1: Intel® Iris® Xe Graphics
Graphics Processor 2: NVIDIA GeForce GTX 1650
Manufacturer: LENOVO
Product Name: 82MG
System Version: IdeaPad Gaming 3 15IHU6

2

I’ve noticed that it’s only stuttery in fullscreen. It’s pretty normal in default and theater mode.

3

There’s a chance that Haruna’s stutters were just a coincidence. And the real issue is how Firefox handles fullscreen videos.

4

I reported this on Bugzilla.