Created attachment 116642 [details]
I do not know how to describe it well, but the sidebar can not be used if used on the left side.
My girlfriend started using LibreOffice, and customize the interface, she realized this problem.
Fedora 22 workstation (gnome 3.16.2)
LibreOffice 18.104.22.168 (22.214.171.124-6.fc22)
This problem occurs when the contents of the sidebar changes depending on a particular object (contextual change).
not reproducible under Win7x64 using LibO 126.96.36.199
*** This bug has been marked as a duplicate of bug 72007 ***
nice to know that issue has been fixed in forthcoming LibO 4.4.4