[MC-297323] Minecraft incorrectly throttles FPS when multiple windows are focused, even if the "Reduce FPS when minimized" or "Reduce FPS when AFK" setting is active.

When more than one window is active — for example, using Firefox with YouTube Picture-in-Picture — the game incorrectly detects that it has lost focus, even though it should only reduce FPS when minimized (not when unfocused).
Despite having the "Reduce FPS when minimized" setting enabled (and not AFK), Minecraft still throttles FPS unnecessarily.

Possible fixes:

Add an option like "Reduce FPS when: Never".
Or adjust focus detection so Minecraft only throttles FPS when the window is actually minimized, not simply unfocused.

Environment

Zorin OS 17 (Linux) with KDE Plasma Desktop Environment (installed manually)

Using SDM (Simple Desktop Display Manager) idk if its SDM or SDDM

This issue may also occur on Ubuntu, Debian, Arch, and other Linux distributions with KDE manually installed or pre installed.

Comments 6

Wyatt Steinmann 2025-04-28T22:37:34Z

UPDATE: I think i fixed it by turning off vsync but ima keep it up just in case also maybe fix vsync?? or maybe vsync is causeing the og problem???

MrMuskle 2025-04-29T12:56:29Z

Please do not mark Unreleased Versions as affected. You don’t have access to them yet.

Wyatt Steinmann 2025-04-30T22:59:29Z

ok i removed unreleased versions.

clamlol 2025-05-03T18:48:06Z

Can’t reproduce in 25w18a on macOS Sequoia 15.4.1 (also using Firefox with YouTube picture-in-picture), if I had to guess your OS does not handle PIP fully correctly or does not provide PIP functionality that Firefox relies on on macOS. Maybe search the web for “window focus issues with YouTube picture-in-pictore on Zorin OS” or something similar and see if any helpful resources come up.

Wyatt Steinmann 2025-05-05T20:24:58Z

oh lol had no i deer.

[Mod] turbo 2025-05-06T08:27:52Z

Can't reproduce on my Win 11 machine, probably an issue with your computer software. Resolved as invalid.