There are a number of solutions. All of them fix the problem of the quilt suspension isn't at a steep enough angle. Here are some solutions....
Triangle thingies (Arrowhead Equip) moves the attachment point inward from the end of the hammock, thereby steepening that angle.
Quilt Hooks (Dutch) hold the quilt up against the hammock, closing those gaps.
Shock cord line attached to left & right corners of the quilt and running over the ridgeline.
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