I had my grandmothers quilted bed coat do that. It was an area about 3" in diam. I took lite fusible and fused it to white cotton, then took the paper off, clipped a few threads and slid it under the bad area using needles to smooth it and get it in place, then fused it to the back of the bad fabric, re-sitched the 1" slit. You can't tell it unless you
feel it and its a little crisper. I have washed twice but dry it on a hanger.