I don’t see any pierce delays, I see G4 values for your after cut delay (0.5 sec) but nothing for the pierce. The pierce delay would see an M3 (torch on) followed by the G4 (delay). 16 gauge is probably forgiving and piercing during the move from pierce height to cut height, which is why you are able to run most of the program. But this isn’t how you want to run.
Line 8149 is during the IHS routine. So hard to know if it really happened there or what is going on.
I can’t say for 100% the no pierce delay is the problem, but you should have that working before moving on.
I would wait until I heard back from Sheetcam before burning any more steel. While waiting, are you running with Smart Voltage or have you specified a voltage? Langmuir recommends not using Smart Voltage on material less than 14 gauge, see Lost arc again! - SOLVED
You might want to do the line tests and dial in a voltage. But I would NOT cut anything else until you get a proper post with the pierce delays.