This should be easily recreatable, using the full auto melee setting causes button presses to almost always input the attack twice due to input queuing. This makes the accessibility setting actually worsen your control and amount of inputs needed. As someone who needs these settings to play comfortably, this is really disappointing. I have both powered and default melee assigned to R1 on a PS5 controller, and this issue occurs on both PC and PS5, and on different controllers.