I’m wondering if anyone can help me to a solution on my stitches. My tension seems fine. I have checked on a Towa Gauge. Top thread is Omni (which quilts beautifully on my machine) and Bottom Line in bobbin. New needle, Black Hobbs 80/20 batting. T-shirt quilt. It seems to stitch beautiful on the front but the back looks like half and half stitching correctly. Almost looks like a flatline part of the stitching? Looking for some advice.