Thread:Talk:Reference Tooltips/Tooltiips stopped appearing for no apparent reason/reply

I'd suggest asking at en:User talk:Yair rand/ReferenceTooltips where your question is more likely to be seen than here. :)

(Note: MW1.22 is the current Stable version. It might help to upgrade to that (see Manual:Upgrading), but I'm not a dev, so can't say for sure.)