On multiple sites there is an a special character displayed as "OBJ" with a dashed border at the end of post titles.

This character is shown as a blank space in dev tools / IDE.

It's only after pasting it in a string and running 

''.charCodeAt(0); 

I found the character code is 65532. Could mean there's an issue copying / importing content from certain locations.

See https://stackoverflow.com/questions/50495912/wordpress-site-displays-replacement-character-in-posts 

Example of page with issue https://www-dev.greenpeace.org/brasil/noticias-e-historias/