YouTube web – A rendering bug in YouTube’s web player can trigger an endless loop of resizing, causing stuttering and extreme memory use.
A YouTube web player bug appears to be turning video playback into a performance nightmare, with browsers caught in an endless rendering loop.
Misryoum reports that the issue centers on YouTube’s web interface repeatedly recalculating and redrawing parts of the player.. The result is severe lag, stuttering, and visible frame drops, particularly noticeable when trying to play videos.. In some cases, users also report unusually high RAM consumption that can reach very large figures.
This is happening because the page’s rendering logic keeps flipping between states instead of settling into a stable layout. Misryoum notes that affected users describe sudden slowdowns across multiple browsers, suggesting the problem isn’t isolated to one engine.
More specifically. the behavior has been linked to YouTube’s flexible in-page menu element that hosts controls like like. dislike. and share.. The menu is designed to show or hide buttons depending on available width, so the controls fit comfortably on screen.. Under normal conditions, it adapts smoothly as space changes.
But in this bug scenario. Misryoum says the menu’s width calculations can bounce in a way that convinces the page there is room for a button even after the layout has effectively removed it.. The script then tries to restore the button. which changes the layout again. prompting the menu to remove it once more.. That back-and-forth can keep the browser busy with constant measuring and rendering.
**Insight:** When UI code enters a loop like this, it doesn’t just slow one component. It can keep the whole page in a state of continuous recalculation, which is why both responsiveness and system resource usage can spiral.
Reports tied to the issue mention high CPU activity alongside memory spikes. with some users seeing browser RAM jump quickly after starting playback.. Misryoum also indicates the bug has been observed in several browsers. including Firefox. Brave. and Microsoft Edge. pointing to a YouTube-side rendering pattern that travels across platforms.
Meanwhile. browser developers have been investigating the underlying tag and layout behavior that appear to contribute to the loop. but a clear timeline for a YouTube fix isn’t evident from the current reporting.. Until the issue is addressed. users may need to rely on workarounds like trying a different browser or updating frequently. depending on what becomes available.
**Insight:** This is a reminder that even “simple” web UI elements like responsive menus can have outsized impact when rendering gets stuck, turning everyday streaming into a heavy workload for both the CPU and memory.