Could you provide a .muse file that demonstrates the problem? And/or the URL for a page that demonstrates the problem? (It appears the URL provided has already been altered to workaround the problem.)
If you have a .muse file that demonstrates this, please send it to us at muse-support@adobe.com along with a link to this thread for context along with a note letting us know where to find the problem slideshow. If the file is larger than 20Mb you can use a service like Adobe SendNow, Dropbox, WeTransfer, etc. Thanks.