What stitch length are you using? You may need to shorten it. Also, this can happen if it has not been quilted closely enough. Although some battings say you can quilt up to 10 inches apart, quilting closer will yield a sturdier quilt. Also, the quilting distance should be measured in all directions, including the diagonal. Finally many folks wash the completed quilt before gifting. Better that a seam pops & you can fix it before gifting.