Definitely reach out to Support above ^.
We would need to see the program to determine if there’s something going on with the particular file or line where it continues to fail.
I can offer some insight into the pierce delay issue you are seeing as the XR Pierce Delay is calculated differently than the PRO or CrossFire Pierce Delay. The XR system (MCB/THC/FC) features a voltage feedback that starts the pierce delay “timer” when arc voltage is sensed rather than simply starting after the signal is sent as is the case for PRO/CrossFire. This should bring most pierce delays for XR back in line with “book” delays and is why you are having to reduce the delays from older programs.