I have a Kelpari I want to release. She's 100-something days old and would increase my odds of finding a grove nest. She had been a mission pet, is level 60, and I think she's strength?
Well, I went to release her, I typed in her name, clicked release, and got the "are you sure you want to release un-named?" Second popup. There was no confirm button. Only cancel. So I could not release her. Though I released pets earlier with no such issue. I'm on an Android phone and using Chrome.

EDIT: exited the page to write this, came back and was able to release her.