Hello.
Have you got the answer from WPTouch? ECAE is not modifying the posts content so we think it is related to the mobile theme (WPTouch) that you used on your website.
These might also help:
https://support.wptouch.com/article/1448-shortcodes-not-showing-up-in-wptouch-pro
https://support.wptouch.com/article/1471-advertising
Best regards,
Tonjoostudio Support.