Plugin not displaying short codes correctly

There seems to be a display issue with my particular wordpress theme and this plugin.

All the features are functional, but the short codes are displaying as text when in the pages that ideastream have created.

Is there any ideas you might have to help this display issue?

https://www.cookingtheebooks.com.au/ideastream/

https://www.ads-software.com/plugins/wp-idea-stream/