While printing from SD-Card it is currently not possible to send manuel commands like M105 to get the temperature, or M114 to get the current position.
I agree that you should be prevented from moving the head manuelly, but think these to should be allowed for diagnostic purpose.
which also lets me think of M111 “Set Debug Level”, which i haven’t tried to send during print.
also havent tried if M220 and M221 work if send manuelly and not by long pressing the button.
Maybe someone else can think of other command which should be allowed.
Happy Holidays
Sebastian