This is very likely what happened to make the hole.
When you advance the quilt with the needle down, it will move the machine along with the quilt. If you reach out and grab the machine to move to a new location and forget to raise the needle out of the quilt, it will make a little rip.
Ask me how I know this.....
What I did was to take a piece of the original fabric and matching the print, appliqued it over the top of the rip. Also you need to do in on the back.
You will never see the repair.
I do believe that your Long Arm Quilter should at least be willing to make this repair for you. I did when it happened to me.
And I didnt wait for the quilter to find out, I told her about it up front.