Hello,
unfortunately is a common problem with themes that use custom trimming of content and not default wp excerpt. In order to fix this you have to modify your theme’s code. I would do that for you, but I can’t get the code as it’s a paid theme.
In you theme’s files you have to find the the line containing function $some_variable = wp_trim_words(…..
and after that line just insert the following code
if (function_exists(’emailit_display_button’)) $some_variable = emailit_display_button($some_variable);
$some_variable would have a different name for your theme.
I hope this should help.