Hi Sebastien,
quite a long time... had about 5 Weeks over Christmas and still under heavy workload. :-)
Hope you are fine (and a happy new year ;-) )
I tried to use the Wysiwyg Editor and it seems there is a javascript problem, possibly a compatibiliy issue.
The page stops applying all jquery scripts, when Wysiwyg Editor is present on page.
I am not sure, if is a problem of yours or the Wysiwyg scripts, but I just want you to be informed there is a problem.
See screenshot attached.

kind regards
Patrick