Hello,
after I did an update of SP Page Builder from 3.8.3 to 3.8.4 and then to 3.8.5, the text add-on in SP Page Builder does not work anymore, if it is embedded in a module. If you press "Edit" on a Text add-on, nothing happens.
The website is not yet public but running under MAMP on my local machine, so I cannot send a link to it currently.
Probably the bug is similiar to the one you fixed for article embedded text add-on.