That is really odd, when using hobbs.

This is called bearding. The most common problem of bearding is the batting is upside down. If your batting has a scrim the scrim goes on top. To tell if you have a scrim, one side of the batting is very smooth to the touch and the other side will feel like batting. Also, you can look very close at the edge or corner of the batting and you can see a very thin fabric like fiber that you can separate from the batting.

Glad to see changing the needle took care of your problem.

Once you wash it, you should be OK.

WOW! I learn something on here everyday. I never knew batting had a right and wrong side.

It can also be a chemical reaction between your fabric and your batting. Nothing is wrong with either, it's just that combination. It will go away with time, use, and washing.

crashinquilt ( or anyone who knows) I have a question: I didn't know batting had a right and wrong side either. I have never had a problem with it coming thru the top or bottom of my quilts. But so I can be sure I am putting it in right, which side goes next to the top and which side goes on top of the backing? thanks.

I only know warm and natural, the side with the cotton nubs, (dirty looking side) is the top. For a long time I thought the clean side was the top, not so.
Warm and white, the right side up against the top is the textured side. (I always have to check my sample I have written on)

Thanks brushandthimble, I am going to copy that and keep it handy!!

Which side of the batting is the scrim, the smooth side or the one with the rough feeling? I have never heard about this before. Thank you for sharing.