Update: we suspect that once we go out of beta mode, then reference previews will disable itself when CiteTooltip is enabled, and the tooltips will correctly appear.

The gadget's code sits here [1]

The gadget seems to be triggered by the user setting for the BetaFeatures and not by code that might be executed.

mw.user.options.get('popupsreferencepreviews') != '1' [2]

We definitely need to look at this again if eventually leave beta for he.wikipedia. The setting that triggers Reference Previews will be different then, but the original betafeature setting will still be in the DB I guess.

[1] https://he.wikipedia.org/wiki/%D7%9E%D7%93%D7%99%D7%94_%D7%95%D7%99%D7%A7%D7%99:Gadget-CiteTooltip.js
[2] https://he.wikipedia.org/wiki/%D7%9E%D7%93%D7%99%D7%94_%D7%95%D7%99%D7%A7%D7%99:Gadget-CiteTooltip.js#L-3

Uh, this is really cool. This is the first wiki that intentionally disabled their (default!) gadget in favor of our feature. The relevant change was made in December 2019: https://he.wikipedia.org/wiki/Special:Diff/26873772.

We missed that when we made our list at https://docs.google.com/spreadsheets/d/1JfkqvdhqrT7gXb1pDKWhqE2yaV-HcZe9pH4VGyJtoTs. I updated the list to reflect this new finding. I also checked all other wikis that use the same CiteTooltip gadget. But this is the only one that was modified so far.

Note that T276330 is only a temporary fix as long as the feature is in Beta on this wiki, as already mentioned above. The moment we are not in Beta any more, we must either add our exclusion back, or ask the gadget author to update their script again.

Next step: Message the user and ask if they can update the gadget to include both the old as well as the new setting name popups-reference-previews (see https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Popups/+/682926/2/src/isReferencePreviewsEnabled.js#36).

It's done: https://he.wikipedia.org/wiki/Special:Diff/31279543