It looks like a bobbin issue. Was it sewing well and then went goofy? It looks ok in your picture on the right. Re-thread the machine, both top and bottom. It wouldn't fix this problem but I use those
Bobbin Genies and it has eliminated alot of different issues when FMQ. Do you use these? They make the bobbin spin smoother or something. I don't know exactly what they do but they work. I use them in all my machines.