I had the same issues 3 months ago when I got mine. I sent mine for warranty service because I feared other issues arising, and I didn't want to void it by attempting my own repair.
When it was returned, it ran and smoked great. After some usage though, the power cutting out issue returned, but not the smoke or the arcing problems.
From what I had read on this forum, I first checked the pilot truck wire and sure enough it was loose...too stiff to endure the dynamics. So I replaced it with a super flex wire.
I know DIY is a risk if other issues arise in year one that need warranty serice, but it seemed to me that if Concord didn't replace with super flex the first time, then I was going to have this particular issue no matter how many times it went to Concord. So DIY is what I chose.