Creating a new tag by itself fails on mobile

(Bug, Investigate , Priority: Medium, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Mobile, Tag Sets, User Interface
Summary: Needs further examination, but something seems broken.
Only had problems when the tag set is empty, and I try to add just a single tag that doesn't exist yet.
Only confirmed in Chrome mobile, in this Space. Does it happen on desktop? I am having difficulty reproducing this at all.