I had been having that problem as well, and it is truly exasperating.
I found turning the needle to 5:30 or even 5:00 (6:30 made it worse) is giving me perfect stitches every time. I was snagging, looping, breaking, and swearing like a sailor. And this machine is replacing another one, so I have deadlines and clients who can't wait for me to figure it out, or to pick out bad stitches and do it over.
Another quilter told me that turning the needle is "cheating" and "not an actual solution", but if you could see my before and after pics, you wouldn't think so.
Someone with a different brand of machine told me to just go from left to right, break the thread and go back to the left side again.
So, unless someone has a better solution than "that's cheating" or "work around the problem by only doing straight lines, starting from the left only", I'll embrace my late afternoon needle solution and rock with it.
So I wanted to give an update ... I contacted APQS, and they told me to use a 3/16" allen wrench to tighten the screw behind the pressure brake. It worked! Now I can have it pretty much as tight as I want. I think the screw loosens over time, so I just have to re-tighten periodically.