[UI/UX] Choppy UI and Scrolling in Jellyfin Media Player Compared to Web Client

[wheremygit]

Describe the bug
The Jellyfin Media Player client has noticeably choppy and sluggish UI performance, especially during scrolling and navigation (e.g. library views, menus). This is in contrast to the web UI, which performs smoothly under identical conditions. The issue appears to be consistent and not affected by themes or CSS.

To Reproduce
Steps to reproduce the behavior:

1. Launch Jellyfin Media Player.
2. Navigate anywhere.
3. Scroll through the content.
4. Notice the sluggishness and choppiness compared to the same action in the browser (web UI).

Expected behavior
Smooth UI performance and scrolling behavior similar to what is observed in the web client.

Screenshots
Videos comparing Jellyfin Desktop Client & Jellyfin WebUI

Jellyfin-Client
https://github.com/user-attachments/assets/4eeb2b0d-10f1-4182-9f28-966b72ee72ba

Jellyfin WebUI
https://github.com/user-attachments/assets/807b827d-183a-4ae1-bc0c-536f15e0cf65

Desktop (please complete the following information):

• OS: Arch Linux
• Desktop Environment: KDE Plasma
• Installation Method: AUR
• Jellyfin Media Player version: 1.12.0
• CSS Modifications: Using custom theme CSS, but issue persists even with default styling. Web client works flawlessly with same CSS.

[andrewrabert]

Confirmed - also KDE Plamsa, but building directly off of main.

[curiousignite]

Having the same issue with hyprland

[nikolasmish]

Same, Arch, Linux 6.17.4, installed from AUR. Playback works fine, only UI seems to be lagging.

[Mullato]

Having the same issue on Nixos Hyprland

[CheekyPanda2]

I also notice that scrolling through the library is notably more choppy than the webui.

[Generator]

Also noted this today on KDE using JMP flatpak.

Migrated my setup from NVIDIA on X11 to AMD Radeon on Wayland.
Previously on NVIDIA/X11 didn't had this issue. I was thinking may is something with my setup.

[Algram]

Having the exact same issue on Nixos and Sway.

[Generator]

Update: After checking the settings (KDE Plasma), the issue only happens when using scaling (e.g. 125%), if set the scaling to 100% the UI looks smooth.

Also tested on X11, no issues