It seems we've had multiple internal reports of expand on hover intermittently not working. It looks like whenever you get into this state, `mouseenter` and `mouseleave` events are still firing and `_animateSidebarMain` is still being called in `browser-sidebar.js`, so this is a bit perplexing. Currently we have no STR, but we're still attempting to reproduce the issue. I wanted to go ahead and file this bug in case anyone had more information while we investigate further.
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It seems we've had multiple internal reports of expand on hover intermittently not working. STR: Enable vertical tabs and expand on hover. While hovering over the expanded sidebar, right click the sidebar and select "Turn off vertical tabs" from the context menu. Then proceed to drag a horizontal tab around the tab strip. Right click the toolbar and select "Turn on vertical tabs". Expand on hover is turned back off now. Re-enable it using the customize sidebar panel. Hover over the sidebar to expand it and notice how it remains expanded even once you hover outside of the sidebar.
It seems we've had multiple internal reports of expand on hover intermittently not working. STR: Enable vertical tabs and expand on hover. While hovering over the expanded sidebar, right click the sidebar and select "Turn off vertical tabs" from the context menu. Then proceed to drag a horizontal tab around the tab strip. Right click the toolbar and select "Turn on vertical tabs". Expand on hover is turned back off now. Re-enable it using the customize sidebar panel. Hover over the sidebar to expand it and notice how it remains expanded even once you hover outside of the sidebar. Note that the issue goes away with a browser restart unless you take the steps taken above again.
It seems we've had multiple internal reports of expand on hover intermittently not working. STR: Enable vertical tabs and expand on hover. While hovering over the expanded sidebar, right click the sidebar and select "Turn off vertical tabs" from the context menu. Right click the toolbar and select "Turn on vertical tabs". Expand on hover is turned back off now. Re-enable it using the customize sidebar panel. Hover over the sidebar to expand it and notice how it remains expanded even once you hover outside of the sidebar. Note that the issue goes away with a browser restart unless you take the steps taken above again.