Devout Christians who work in the entertainment industry are a lot different than those who work a normal job. American examples would be Carrie Underwood and Kelly Clarkson. Minzy is a devout christian and she openly works with a girl who sings about girls having lesbian crushes and liking those sweet unni's lips.
It's clearly not an accident. SM is known for leaking stuff. This is not new information.
I wouldn't say they're already known for leaking, because this is still somewhat unexpected and GG was DEFINITELY shocking, but they ARE fast becoming known for it now