A bug is sending YouTube's net participant into an infinite loop of lag

[ad_1] <img class="e_Kg" decoding="async" loading="eager" sizes="(min-width: 64rem) 51.25rem, 80vw" title="youtube new desktop ui october 2025 4" srcset="https://www.androidauthority.com/wp-content/uploads/2025/10/youtube-new-desktop-ui-october-2025-4-scaled.jpg 2560w, https://www.androidauthority.com/wp-content/uploads/2025/10/youtube-new-desktop-ui-october-2025-4-64w-36h.jpg 64w, https://www.androidauthority.com/wp-content/uploads/2025/10/youtube-new-desktop-ui-october-2025-4-1000w-562h.jpg 1000w, https://www.androidauthority.com/wp-content/uploads/2025/10/youtube-new-desktop-ui-october-2025-4-1920w-1080h.jpg 1920w, https://www.androidauthority.com/wp-content/uploads/2025/10/youtube-new-desktop-ui-october-2025-4-1536w-864h.jpg 1536w, https://www.androidauthority.com/wp-content/uploads/2025/10/youtube-new-desktop-ui-october-2025-4-675w-380h.jpg 675w, https://www.androidauthority.com/wp-content/uploads/2025/10/youtube-new-desktop-ui-october-2025-4-300w-170h.jpg 300w, https://www.androidauthority.com/wp-content/uploads/2025/10/youtube-new-desktop-ui-october-2025-4-1280w-720h.jpg 1280w, https://www.androidauthority.com/wp-content/uploads/2025/10/youtube-new-desktop-ui-october-2025-4-840w-472h.jpg 840w" alt="A photo of the new YouTube playback UI as of October 2025." src="https://www.androidauthority.com/wp-content/uploads/2025/10/youtube-new-desktop-ui-october-2025-4-scaled.jpg"/> Joe Maring / Android Authority

TL;DR

YouTube’s net participant apparently has a rendering bug that sends browsers into an infinite loop of visible adjustments. The fixed web page rendering loop is inflicting processor and RAM utilization to skyrocket, with customers reporting reminiscence consumption within the gigabytes. Customers with browsers affected by the bug are noticing excessive lag, stuttering, and body drops throughout video playback.

YouTube customers are reporting points with the platform’s net participant, with the location inflicting unexplained browser lag and excessive reminiscence utilization. The stutters, body drops, and RAM consumption are affecting customers of a number of browsers, together with Firefox and Courageous, in keeping with posts (1, 2) on Reddit.

The builders on Mozilla’s discussion board say that the “ytd-menu-renderer” tag, which homes the like, dislike, and share buttons, is inflicting the visible bugs. It is a versatile menu that dynamically exhibits and hides buttons primarily based on the out there display width. The builders clarify that “ytd-menu-renderer” works by eradicating one button robotically if they're overflowing on the display, and placing the buttons again when the menu factor widens. The code is meant to make sure solely the buttons that match in your display comfortably are proven.

<img class="e_Kg" decoding="async" loading="lazy" sizes="(min-width: 64rem) 51.25rem, 80vw" title="A screenshot discussion of the YouTube web player bug." srcset="https://www.androidauthority.com/wp-content/uploads/2026/05/YouTube-Web-Player-Bug-Screenshot.png 1416w, https://www.androidauthority.com/wp-content/uploads/2026/05/YouTube-Web-Player-Bug-Screenshot-64w-49h.png 64w, https://www.androidauthority.com/wp-content/uploads/2026/05/YouTube-Web-Player-Bug-Screenshot-1000w-767h.png 1000w, https://www.androidauthority.com/wp-content/uploads/2026/05/YouTube-Web-Player-Bug-Screenshot-1408w-1080h.png 1408w, https://www.androidauthority.com/wp-content/uploads/2026/05/YouTube-Web-Player-Bug-Screenshot-1127w-864h.png 1127w, https://www.androidauthority.com/wp-content/uploads/2026/05/YouTube-Web-Player-Bug-Screenshot-495w-380h.png 495w, https://www.androidauthority.com/wp-content/uploads/2026/05/YouTube-Web-Player-Bug-Screenshot-675w-518h.png 675w" alt="YouTube Web Player Bug Screenshot" src="https://www.androidauthority.com/wp-content/uploads/2026/05/YouTube-Web-Player-Bug-Screenshot.png"/> Nonetheless, the developer feedback level out that “hostElement.clientWidth” grows when “ytd-menu-renderer” robotically hides a button. This causes YouTube’s code to suppose the menu space is large sufficient to suit the button, so it provides the button again. After all, since there isn’t truly sufficient visible area, “ytd-menu-renderer” removes the button once more. The menu container expands as soon as once more, and also you most likely get the thought. It’s a endless cycle that forces your browser and PC to maintain calculating, resizing, and rendering YouTube’s versatile menu.

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<img class="e_Kg" decoding="async" loading="lazy" sizes="9.375rem" title="google preferred source badge light@2x" srcset="https://www.androidauthority.com/wp-content/uploads/2025/09/google_preferred_source_badge_light@2x.png 676w, https://www.androidauthority.com/wp-content/uploads/2025/09/google_preferred_source_badge_light@2x-64w-20h.png 64w" alt="google preferred source badge light@2x" src="https://www.androidauthority.com/wp-content/uploads/2025/09/google_preferred_source_badge_light@2x.png"/><img class="e_Kg" decoding="async" loading="lazy" sizes="9.375rem" title="google preferred source badge dark@2x" srcset="https://www.androidauthority.com/wp-content/uploads/2025/09/google_preferred_source_badge_dark@2x.png 676w, https://www.androidauthority.com/wp-content/uploads/2025/09/google_preferred_source_badge_dark@2x-64w-20h.png 64w" alt="google preferred source badge dark@2x" src="https://www.androidauthority.com/wp-content/uploads/2025/09/google_preferred_source_badge_dark@2x.png"/> This bug locations additional pressure on a consumer’s system assets. Customers noticed their browser’s RAM utilization spike from a couple of hundred megabytes to consuming a number of gigabytes after trying to play a YouTube video. Others observed their CPU core utilization skyrocket whereas utilizing YouTube’s net participant, as documented by one other Reddit put up.

The YouTube net participant rendering bug is affecting customers throughout a number of browsers, together with Courageous, Firefox, and Microsoft Edge. Mozilla is trying into the infinite loop difficulty because it pertains to its Firefox browser, nevertheless it’s unclear when a repair on the YouTube facet is likely to be out there.