Instead it should make a copy and insert the copy without affecting the attached item. SVG 1.1 specs: https://www.w3.org/TR/SVG11/types.html#InterfaceSVGLengthList SVG 2 specs: https://www.w3.org/TR/SVG/types.html#TermListInterface This will affect the following methods: initialize() insertItemBefore() replaceItem() appendItem() of the following interfaces: SVGNumberList SVGLengthList SVGTransformList SVGPathSegList
This is already fixed by removing the SVG properties tear off objects. *** This bug has been marked as a duplicate of bug 191237 ***