OK maybe this was too aggressive even for Adaptive Clearing ;)

[JAZZCNC]

I like the way the sacrificial bed moves to save the cutter when the spindle overloads

To be honest I think that would have contributed to the stall slightly because if you watch carefully it starts moving around soon into the cut and because the cut was so aggressive was pulling material into the cutter increasing the step over.
When first watched saw that straight away and first thoughts where it had pulled into cutter but after checking i-machining can see it was bit aggressive but just for laughs think I'd try again with stiffer setup.