What I’m noticing is that the CSS styles that were applied to the master page elements and called by the original section (‘Plain Run Page’) are not being applied to the cloned sections:
[Plain Run Page]
[Plain Run Page Clone 1]
Based on these screenshots, it looks like default.css is not being applied to cloned sections which is why the formatting of the text is different between the original and clone.
If this is the case, is there a way to apply the default.css to the cloned section?
This is indeed a known issue in 1.7 (unfortunately) After creating section clones via a Control Script, the links with the CSS stylesheets files are gone. This causes the formatting to be lost.
Typically the CSS stylesheets reside in the Stylesheets folder located in the Resources panel of the template. The cloned section no longer references these files. These files are normally referenced by <link> tags in the <head> section of the HTML. An example:
Workaround
An User Script (e.g. script entries residing in the Scripts folder of the Designer) can be used to re-establish the link to these files. E.g. add the respective <links> to the <head> element of each section. Below a sample script to link the standard stylesheets and a custom stylesheet to the <head> of each section.