the printer pauses after the initial gcode only on the first print after power on

[Nocentinia]

hi guys,
I have a small problem related to the first printing after the printer is turned on.
when i launch a print it happens that after the initial G-code the printer pauses but it does it only in the first print after power on!!!
when I restart the print moreover it sets my acceleration limits to 500 mm/s^2 (instead of 7k ignoring the values entered in the slicer of 3k) and also sets the Square Corner Velocity to 8 instead of 5.
How can I fix this?