Illumination bug in CeBitSimulation with 3 instances of ARMAR-6 robot

Illumination model bug: https://bwsyncandshare.kit.edu/s/Fa3GCQ8meD9ysbH

Reproduce:

Start scenario "CeBitSimulation" from armar6_skills

There are three robots in the scene:

• by PickAndPlaceComponent: bright
• by RobotStateMemory: dark
• by RobotToArViz: bright

According to the ArViz data, they should be identical.