I went into my site today (https://digitalcommercialsystems.com) to make some updates and noticed that all my Text blocks now have [text_output] and [/text_output] tags wrapped around the content. Strangely, it shows up on both the Text Tab and the Visual Tab when I edit the block. I use Visual Composer. In fact, all my tags are visible in the Visual Tab view. I have X 6.3.8, Cornerstone 3.3.8 and WP 4.9.8 … running in a child theme.
The pages currently display fine. But I am afraid to update a post in fear that the code will be exposed. I don’t see anything on Google or your support site about this issue.