Context: oXygen 21.1, build 2019101513 running on a Mac, generating WebHelp Responsive.

The template descriptor file contains the following parameter, yet the tooltips are still visible in the output:

<parameter name="webhelp.publication.toc.tooltip.position" value="hidden"/>

Is this a known bug? If so, any advice about how to best override it? I do have a DITA-OT plug-in in place to override the following: task label for the <tasktroubleshooting> element.

Many thanks in advance!