Cover the stitch hole
The edge of the material must be placed on the marking behind the stitch hole.
If the material does not cover the stitch hole or only partially covers it, the material will be pulled into the machine with the first downward movement of the needle; or, as some people say, "the machine eats the material".
Especially when sewing thin fabrics, it is better to start about 0.5-1 cm in from the edge and then sew 3-4 reverse stitches to the edge of the material. This also has the advantage of securing the start of the seam at the same time.