This short video is to demonstrate the Kobra 3 + Ace Pro Combo when it is preparing to print a GCode file sent to it from the Anycubic Next slicer. We see the same bahavior when the print is sent from the Anycubic Slicer, also when started from a GCode file on the USB stick.
Fast forward through the video if you like. The key here is to demonstrate the full sequence up to actual print start