the only time I have problems with the stitching when I twist the seams - is if I used the thread cutter on my machine when I ended the seam before I sewed the one I'm trying to spin - as the thread has a tendency to tangle just a tad when I start the next seam, even if I hold the top thread out of the way. If I don't hold the top thread, then I get a big tangle.
If I chain, I make sure to cut the threads closer to the fabric, so they unsew easy when I spin.
I occasionally have a center that won't loosen, and those I undo a thread or two and then it's fine.