Hello,

Could you please check how it works with some default WordPress theme like twentysixteen to understand is it our theme issue or not?

Our AJAX requests have a timeout of 5 seconds and if they don’t get a response from the server at this time the page will be loaded in a natural way. If you need, we can give you an instruction how to increase this time to 10 or 15 seconds but it is not a solution and you can try to disable this function completely.

Kind Regards
Xtemos