Height has disappeared?

The height on my slider has disappeared and I don’t know how or why?

I haven’t upgraded the plugin in the past six months so there has been no changes, BUT the slider just disappears: http://www.janomesewingcentre.com.au

When I looked at the code and compared on web.archive.com with the previous working version, the height value from the div class=cycloneslider-slides cycle-slideshow has disappeared.

It is an inline element and it looks like it is updated via js based on the screen size (i.e. a responsive behaviour)

It appears this behaviour is no longer working?

Any ideas?

https://wordpress.org/plugins/cyclone-slider-2/