Hello There,
In the previous version, the section were defined as
[cs_section] ...... [/cs_section]
And in the latest version, it displays like this:
[cs_element_section _id="1"][cs_element_row _id="2"][cs_element_column _id="3"][cs_element_nav_dropdown _id="4"][/cs_element_column][/cs_element_row][/cs_element_section]
This could potentially affect how the highlighting in the editor which would also explained why the classic ones that you are having trouble. This does not break the editor. Some features may have stopped working or no longer work due to the change in the structure of the data.
I wanted to test your page and it is not letting me. The page has a JS error and it is stopping me from seeing what you are experiencing. Anyways, I will add this in our bug list so that our developers can confirm if this is just a conflict or really a bug in the latest release. once they’ll have it figured out, it will be updated and will be rolled out in the next update release.
Thank you for your understanding.