Reality Composer in Xcode Beta 3

Reality Composer as part of xCode 11 Beta 3 showing all objects with material colors black.

On iOS 13 devices all is well. I placed a bug report 6483210. The detals are in the bug report.

Does anyone else having this issue. On MAC OS the Reality Composer is imbedded in the xCode

bundle. Object show up with Material color black trying to change or edit material collor is not

working. Beta 2 was fine. This issue is present after installing xCode 11 beta 3. Display of the same

scene appering with material color allways black with Quick View has the right material colors.

Example in my bug report a chess game setup. Any explanation please