When do you disable enter to submit? Seems kind of random when that happens and when it doesn't.
it is disabled once your question gets over a certain length. that's because for long questions it is usually not expected behavior, plus it sabotaged the question, causing sadness. where as in short questions, i find it IS expected behavior, and before i implemeted it i would constantly get questions with several blank lines at the end from people trying to send with enter. also on mobile it is always disabled because i don't think anyone expects that on the mobile