Please change the button used to leave missions when dead.  The current button on Switch is A, which just so happens to correlate with the default button for melee attacks.  If you're in the midst of heavy melee fighting when you die, there's a strong chance you'll not only click the button to leave mission, but on the follow-up "Are you sure" dialog you'll also click the confirm button, which is also A.  I've left multiple arbitrations because of this, when I'd have much rather stayed.