I've been changing colors on the top thread, to match different areas of the quilt top, and using the same color in the bobbin because it blends in well with the backing.
I took a break from that and was FMQing with a different thread and bobbin, foot, etc.
I put the feed dogs back up, changed back to walking foot and changed needle, thread and bobbin.
Now my bobbin thread is suddenly pulling up to the top where it is visible, it looks terrible.
Do you have any idea why?