I've been unable to pin down exactly which module that causes the problem, but I'm leaning towards page cache.
I have page caching configured exactly the same as every other site where I use this plugin with no issues. I suppose there must be a conflict with one of the other installed plugins, but I'm not sure which.
other plugins installed are:
Contact Form 7
Google Analytics for WordPres by Yoast
Leaflet Maps Marker ®
Local Search SEO Contact Page
WordPress SEO by Yoast
also, in case it's noteworthy, I'm using Pagelines platform for the theme.
I'm currently using the xml sitemaps build into the Yoast seo plugin, but I've also tried disabling that and using other gxml plugins with similar results
with yoast, I get a blank white page when trying to view the sitemaps, with other plugins, I just get a default hosting 404 (not even a wp 404)