We are using O365/Sharepoint Online 2013.
In our document center site we have a tree view enabled in our site settings, so that all the Site Contents (Document Libraries) are shown in the left side of the page (a bit like the view in Windows File Explorer). When we create of delete a Document Library from the Site Contents, it affects the tree view so that the items appear/disappear from there too.
Now when we try to rename a Document Library in the Site Conents by going to the settings of that library, the name does change in the "Site Contents" list but in our tree view at the left side of the page it will still show the old name.
What is wrong? How to fix this? Is there another way to rename Document Libraries so that the renaming would affect the tree view too?