Most Wikimedia sites use the mediawiki default of an Arrow ↑ to backlink from citation-contents to the superscripted number/letter.
English Wikipedia changed the default in 2006, to use a caret ^ and a few dozen other wikis have copied that.
We'd like to examine the problems with the Arrow, to see if they can be fixed.
We need help browser-testing and diagnosing and fixing the problem(s).
This may have strong relevancy to the Typography Update in Beta Features.
I've tried to summarize everything so far, at https://en.wikipedia.org/wiki/Help_talk:Cite_messages#Testing_and_summary_so...
Thanks! Quiddity