Pixel Exit Staff
We shipped out the 2.2.13 styles with some updated CSS for the sidebar that breaks the display when the sidebar is really long.

To correct this for now, place this into your extra.less:

#XF .p-sidebarWrapper { height: auto; }

This will be adjusted in the next release.
This is adjusted in 2.2.14. It was primarily happening with sidebars longer than the content when the sidebar was sticky and set to the left side. Pretty specific but it should be fixed!

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