Captions are not safe identifiable
No bro, it's not an identifiable block and it's not a safe way to format image next paragraph[em] as figcaption.
You can see even image and caption are not in the same parent tag!

Unfortunately, In this site there isn't any identifiable tag or classname for captions.
Thus I decided to don't format these cases as figcaption.
I have seen many cases that doing this has caused a part of the text after img to be deleted. This may have happened to you in your templates by doing that.
See a case with mentioned problem:
https://tinyurl.com/rptnoticias
See some similar declined issues:
https://tinyurl.com/dniprograd
https://tinyurl.com/addisstandard
https://tinyurl.com/brasil247-com
Good luck. 👍