I have an issue I've been facing for quite some time now. Occasionally, my needle misses the bobbin and causes me to have to re-thread the needle. This happens frequently, for example, I could be embroidering 1 color or multiple colors and when the machine cuts and moves to the next spot, it starts, but misses the bobbin and causes me to have to re-thread the needle. This is quite a nuisance especially when there's 300 shirts to run and it does it on every one! Sometimes the same spot, sometimes different spots. Any suggestions? Thanks.