Internal page links not working after installing JUX Mega Menu

There are some pages with internal links to anchors that no longer work. (they resume working if the menu is unpublished)
See this page
dryout.tdcdev.co.nz/systems/trojan-tdos

If you click the buttons under the product image they should link to the tabs at the bottom of the page. If the menu is unpublished the link works correctly (ie for the features button the link is #features which links down to the features tab at the bottom of the page). When the menu is published the link changes to dryout.tdcdev.co.nz/#features which incorrectly takes you to the home page.

Thanks for you help