Probably related to bug #1153706. Might even be a duplicate, the other bug only mentions percentages in combination with gradientUnits="userSpaceOnUse" (which is not the case here), though.
Probably related to bug #1153706. "userSpaceOnUse " (which is not the case here), though.
Might even be a duplicate, the other bug only mentions percentages in combination with gradientUnits=