Steps to Reproduce:
https://whatsmybrowser.org/b/YELKTSI
On the Android browser, when pasting an ISNI number directly from VIAF.org, the white space in between the numbers gives an error:
https://www.wikidata.org/w/index.php?title=Q63868562&diff=prev&oldid=943181713

Actual Results:

Lightning error symbol

Expected Results:
Non-breaking white space or other should just automatically be converted to regular white space