1. Visit an entry, e.g. https://www.wikidata.org/wiki/Q18152337
2. Click "edit" next to a "Pages..." header, e.g. https://www.wikidata.org/wiki/Q18152337#sitelinks-wikisource
3. Type a site name, e.g. "it..."
4. [Something, probably; but I'm not sure what]

I. Observed: the site name is fully visible.

5. Press tab

I. Observed: the cursor goes to next field, but then comes back to the site field.
II. Expected: the cursor stays in the next field.

6. Click the next field for good

III. Observed: the cursor stays.

7. Type the title

Version: unspecified
Severity: normal
Whiteboard: u=dev c=frontend p=0