That’s really strange. Are you using “MPCNC_Fusion360_V6_SDcard.rar” or V5 posted above? I have not used V6 but I think there is only a tiny change in the final Z positioning. Right now I can’t imagine how a tool change could be missing. Looks like 5 or so lines of code are missing. Also strange that there is an M106 but no M107 gcode.