Hello Igor, you may need to add the following to the custom CSS file:
a {
pointer-events: auto;
}
If you don't have one already, you may need to create it by copying:
<install_dir>/csp/healthshare/<viewer_namespace>/web/custom/HS/scripts/v2-template.css to
<install_dir>/csp/healthshare/<viewer_namespace>/web/custom/<SiteName>/scripts/system.css