why do you turn it off while charging it? That is not necessary.
Because I charge it overnight and don't want the phone to ring.
Don't turn it off before you plug it in to charge, once connected you can then turn it off.
This is what I'm now doing but often when in a rush I do it the wrong way round and it takes a few minutes to get to the devices back on and off. I don't recall my older Apple devices turning themselves on when being charged and hoped there was a setting that would allow me to charge without it restarting?