Yes, that's the sound of the rift that fails to stop. It happened to me too, and to fix it you have to make a new game and end all the dialogue before the rift animation ends, but not too fast otherwise it doesn't "register" properly. It happens also with the "lewd" music sometime, the fix is the same, but you have to reload: a rollback won't work.
EDIT: Oh, I see it's fixed xD Whatever...