Hi,
in case you are still experiencing issue, Could you please share your .muse file with us to investigate? Please email it to muse-ts@adobe.com. If your file is greater than 30MB you can use something like Adobe SendNow or SendThisFile. Please do not forget to mention the link to this forum thread in your e-mail (along with the OS/Muse/Air version you're using) so that we can identify the file.