Hello,
I have a wikitable with the options sortable/collapsible and collapsed together and multiple header lines
Why the behaviour is different here and there (with the same wiki code) ?
Sanbox Mediawiki ► https://www.mediawiki.org/w/index.php?title=Project:Sandbox&oldid=3584534
Sandbox: wikipedia.en ► https://en.wikipedia.org/w/index.php?title=Wikipedia:Sandbox&oldid=933412098
Until recently on my own wiki (before upgrading to 1.34) a similar table with three header lines let appears only the first one when it was collapsed. (test case 3 of mediawiki sandbox). But not anymore...
Has someone an explanation on this behaviour (all the header lines are visible when collapsed) ?
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