Uh-oh I got the ill communication! A recent software update to Hangouts may be the culprit but Google is currently investigating the issue.
Honestly, is there a glitch more awful than this. You could be sending something incredibly personal and embarrassing to your best friend, and it ends up going to your boss who’s sitting in the room next to you. I’m sure this has already happened to someone and I feel so sorry for whoever you are.