Custom properties are not updating with python commands

In the properties panel > tab: object > Custom properties I have a few custom properties.
When using a python command like:
bpy.data.objects[“GlobalColors”][“BumpStrength”] = 0.022
it is not updating the value of the Custom Property in the properties panel.

I wonder if others could reproduce that, so maybe it’s a bug then.

  • When changing one of the Custom Properties by hand, all other Custom Properties got suddenly updated.
  • When I keyframe one of the Custom Properties, also all Properties get updated.

Could that be a bug?