Try these fixes:
Unthread your machine and remove your bobbin. Clean any loose thread or lint out of your bobbin case. Rethread your machine, reinsert and rethread your bobbin.
Change your bobbin. There could be a nick along the edge of your bobbin spool that’s catching your thread as you sew.
Also, before you start to sew a seam, grasp the upper and bobbin thread tails. Hold them back and out of the way as you sew your first couple of stitches. This will keep them from getting caught in your machine.
If this doesn't help then the fault may be more sinister, Contact us for free advice and assistance.
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