WordPress PHP ECHO breaks the_content() – blank, empty displayed

I have a WordPress page with a

[su_shortcode]
inside shortcode , that includes php file.

include(‘aditionaltext.php’);
This php file generates a for WordPress page.

each line is displayed with

ECHO ‘<td> value </td>’;
Instead of a table I can use one line of a code

echo ‘lorem ipsum thousand times’;
And this will break the content module, but display everything but the content.

Everything works until up to a certain size of the table. Different when you are logged IN and different when you are not.

When it is too big there will be no errors in logs. It will simply load a page without the_content()

There is a header, footer, comments and everything. But the Content is blank. Even not a simple text that is added to the article before the Shortcode.

Does anyone have a clue? Is this some sort of Wordpres Post size limit?

Thank You.

P.S. If this helps, I am using getshortcodes.com

https://i.stack.imgur.com/KZGeo.png

The page I need help with: [log in to see the link]