iOS Safari Whitepage

I've some problem with a Wordpress (4.2.2) page on multiple iOS devices and I don't know how to troubleshoot it without a debugging tool...

If I load a new site via a link, it loads a white page... Then, after reopen safari and reload the page, it is displayed correctly (only reloading doesn't help).

What I tried: - disable all caching pluging / cleared browser-cache - checked chrome's debugging console... no errors - disable permalinks - disable all plugins

I think it's a JS problem, but I don't know how to localize this problem... Someone has an idea? Many thanks!

Regards,