It has happened to me several times that after a simple edition VisualEditor or Parsoid breaks the "</ref>}}" at the end of a reference template. I still don't know which is the pattern, but at least this time I realized it:
http://ca.wikipedia.org/w/index.php?title=El_Chornaler&diff=11962426&oldid=11962407
Other times a second editor had to come after me fixing the broken template. In the preview before saving everything looks fine.
Version: unspecified
Severity: normal