Blending modes dont work in object manager and layer manager

Steps to reproduce:

  • open Inkscape
  • make any two objects one red and one yellow
  • set object on top to any blending mode (multiply, overlay ...)

What happened?

no blending mode work image

What should have happened?

image blend layers should blend colors

Inkscape Version and Operating System:

  • Inkscape Version: 1.0alpha (9bbc588, 2019-01-27)
  • Operating System: win10
  • Operating System version: 1809
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