A JIRA Service Desk project is linked to a Confluence KB.
When we start typing a search in the "main help center", JSD shows a KB suggestion, which displays correctly

When we start typing inside a form, JSD shows a KB suggestion with encoding errors :

Is this the well known Java bug with the single quote character... ?
In this result, it looks that only the single quote is a problem. Other special (french) character are OK.
I do not find any information about this, somebody else have this issue ?
Thanks