I have heard and seen a ton of issues with the M600 command that Creality added to the newest SonicPad firmware. I was able to sit down and come up with a solution to get it to work. (Well me, and a bunch of sources on the web)

This solution has fixed my issues with a mid-print filament change. It has eliminated the issues that I was having with "Extrude only move too long" errors when a print pauses for a filament change.

Give it a try. I hope it works for everyone as well as it has worked for me. And please., like and subscribe!!!