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boomboom
@Chopsicle
IANA Sewing Machine Tech, but there’s no reason why it shouldn’t; the needle/thread feed remains exactly the same, it’s just the feeddogs (the moving serrated teeth in the base) change direction to feed the fabric the opposite way
Does is the needle size appropriate for the thread and fabric weight? It might that in reverse, the thread is being directed away from where it’s meant to be/has more friction/catching into the bobbin shuttle, and causing it to break over a few rotations.
The channel in the needle allows the thread to sit flush, whilst the needle pushes through fabric, and there’s little/no friction on the thread. If the needle is too small for the thread it will catch, and is most apparent as large loops on underside of sewing, but might also cause this loop to catch in the bobbin shuttle …just an idea!