The tab doesn't completely lock up in this case - media continues to play audibly, and keyboard input is possible within the browser -- although invisible -- until the window and tab are visually obscured and then re-opened.
In other words: after the issue appears, switching to a separate application and back again permits a single frame of the browser contents to render, but after that point they remain visually static (until the next manual refresh occurs).
The tab doesn't completely lock up in this case - media continues to play audibly, and keyboard input is possible within the browser -- although invisible -- until the window and tab are visually obscured and then re-opened.
In other words: after the issue appears, switching to a separate application and back again permits a single frame of the browser contents to render, but after that point they remain visually static (until the next manual refresh occurs).