Filter blendmode gets lost when exporting as svg

Steps to reproduce

1. draw a red reactangle
2. add a multi noise filter
   (note that the rectangle is coverd with trippy colors now)
3. set the blend mode of the noise filter from normal to Luminosity
   (note that the rectangle should only contain reddish pixels now, no trippy colors)
4. export as svg

Expected result

The exported rectangle should be red. No tippy colors.

Actual result

The exported rectangle but when zooming in, there are trippy colors.