Tab section breaks

Hi there,

We have an issue where the tab section is breaking after adding content to that specific page. I have posted the current shortcodes as private content. This page is currently working as intended without errrors. Even when updating the page. But after we add new content to this page (we used a color section with a text block) and updating the page, the whole tab section breaks.
Here are a few screenshots of the tab section how it should be and after it breaks: https://we.tl/t-qoS75xvwkU

We also used the Enfold Shortcode Parser to detect any issues. This is the parser info:

ERROR: Registered shortcode [av_one_third detected without closing ] at index 115813. To fix it close shortcode (check for attributes to include).
ERROR:
Summary of missing tags:
Missing closing tag [/av_tab_section] found for an opening tag at index 16206.
Missing closing tag [/av_tab_sub_section] found for an opening tag at index 115414.
Missing closing tag [/av_one_third] found for an opening tag at index 115813.
ERROR: Invalid shortcode was detected. To fix add [/av_tab_sub_section][/av_tab_section] at index 115809.
ERROR: Invalid shortcode was detected. To fix add [/av_one_third] at index 115827.
WARNING: Check to create a textblock shortcode at index 115842 around a text content to keep it editable: first min_height=’av-equal-he …
WARNING: Layout structure for first element must be modified at index 115851: [av_one_third first]

We built a new page from scratch to see if the issue still ocurs, but it keeps breaking for some reason and we can’t find out why.