Presentation Slide Transition Hangs on Slide with Embedded Video

[Steve44]

I'm using a presentation template to make a photo/video slideshow. I'm extremely happy with the results; except, after a slide with an embedded video plays, the keyboard left right arrow keys (also page up/down keys) no longer work to transition to the next slide. The only way to make it transition to the next slide is to use the navigation pop-up in the lower left of the screen. The slide transition works fine as long as I don't play the video.

My video slide is a rectangle placeholder with the following embed code from Vimeo inserted:
<iframe src="https://player.vimeo.com/video/228899736" width="1920" height="1080" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>

The video plays as expected. At the end of the video the slideshow hangs. Is there some code I can put in the placeholder to return slide control to the Xara normal navigation keys? Is there another solution?

A demo of the problem can be seen here: http://conaway.me/test.htm

The Xara web files are attached.

Any suggestions will be appreciated,
Steve44