SNAP/Mailchimp Text Limit?

Successfully connected my dev site to Mailchimp, and campaigns can be sent out successfully.

However, no matter what I try, the text in the mailchimp campaign gets clipped off after about 334 words everytime. (The articles typically have about 1000 words — that’s not a very large post.)

I have tried all settings, increased ram and php, tried with regular posts, custom post types, ACF fields, and nothing changes this behavior.

NOTE: Any additional shortcodes such as %SITENAME% tec. does not even print out in the campaign email. It’s as if the SNAP data is simply clipped off and stops being sent to Mailchimp after 334 words.

Of course, this could be a Mailchimp issue, and I have also written to them — but it just doesn’t feel like that’s the case. Especially since the Mailchimp default Footer section is being output correctly.

Any ideas out there as to why the text gets clipped off when SNAP posts to Mailchimp?

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