Steps to reproduce:
- Go to https://de.wikipedia.org/w/index.php?title=Wikipedia:Adminwiederwahl/%C3%9Cbersicht&action=edit&oldid=152018196
- Select Kategorie:Wikipedia:Adminwiederwahl in line 12
- Drag it to the search box at the top right of the interface
Notice that Wikipedia-Adminwiederwahl is inserted in the search box, rather than the originally selected string. (Chrome 52, Win 8)