Tag synonyms suggestion textbox is overlapped by Suggest button

[![bug picture][1]][1]

  [1]: https://i.sstatic.net/lEv8I.png

Example [link on Stack Overflow](https://stackoverflow.com/tags/table-valued-parameters/synonyms) (requires 2500+ reputation), also reproduced the same on Stack Overflow in Russian. I don't have other site accounts where I have 2500+ reputation to be sure that it affects other communities than Stack Overflow plus localized versions.

All major browsers on Windows have this issue: Chrome, Firefox, Edge, IE.