Was a bug in MediaWiki 1.39 and 1.40, fixed in MediaWiki 1.39.5 and 1.40.1, so a minor upgrade of MediaWiki is a solution. Else this commit is a temporary fix of the extension Matomo.
In my console I have thise error : "The method setSiteId is registered more than once in "_paq" variable." In my source code the matomo script is present twice.
And in the matomo dashboard, all pageviews are counted two times...
I use MW 1.39 and last matomo version.
An idea ?
As a temporary "fix", I copy-paste once the script code in my skin php code and disable the extension. Work fine. But not really elegant...
For some reason "SkinAfterBottomScripts" hook is called twice. Sounde like a bug on MediaWiki side.
I used this workaround to be sure the code is called only once https://stackoverflow.com/questions/68817953/how-to-run-this-script-only-once
Thanks for the info. Finally I used the Header scripts extension to manage all this from Local settings. It works like a charm and it suits me.
This commit fixes the problem (just tested on MW 1.39). Carefull though, the extension is apparently not very well-maintained.