Easy, there you go blaming zipties again.
Truly it is a CAM programming thing. This is people full time jobs that they go to a lot of schooling for and get paid insane amounts of money. You cut wonderfully and then more than doubled the load on the entire machine and are wondering why it isn’t working. I can barely cut 9mm of soft pine at once, I made a video to prove it.
Have a look through my previous post again, I gave you a full breakdown.
As for plunging, always peck if you can’t helical cut, never ever straight plunge unless you are using a drill bit. You can’t just jam a bit made to cut on its side faces into material and hope it works.