The 1st time it seperated.
Update 2-18-2020
Dave at P3R has been fired. I heard they are servicing the cranks they have in house and finishing any orders. They maybe done. That means no one will be able to service your 1 off crank. There are 220+ cranks out there and they are going to leave everyone high and dry.
Conversation with Dave from P3R.
The 1st time they separated, when Jim Robinson @ Head Hoggers had my motor and discovered something was wrong with the crtank