I had this same arc, had it fixed by changing to a program slot and then later it started failing again.
In my case, I had the first program slot empty or at least disabled. I also took screen shots of the program settings, and added them again without leaving the first program slot open and it has been good since then in that regard so far.
But I have other unrelated issues now.
I think it is a marvelous device when it is working, but there appear to be software issues.