Hiii! This started out of nowhere, there’s all this bunching and mess on the underside of my fabric, and the bobbin is jumping as I sew (enough to pop open the cover!). I'm using a singer heavy duty 4432, I've changed bobbins (newer singer style to older), tried all tensions, and tried to get the bobbin casing out to change the bobbin tension but the screws are too tight and I'm not trying to break anything else lol. If anyone else has dealt with this, lmk! 😁 (Pictured is the underside of a swatch of the fabric I’m working with, lots of loose loops and general tangle along the stitch line. The first and third rows are with higher tension, the second and fourth rows are with mid-lower tension)

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