Some views empty, some showing "xxx is not supported with Qt5 projects" after creating 3D project

Steps to reproduce:

• Start Design Studio with -tcs option
• Create a 3D project (should have Default workspace as a starting workspace)
• Change workspace from Default to 3D Advanced
• -> Some views are completely empty and some show "xxx is not supported in Qt5 projects". See attached picture
• Add code view from View -> Views
• Code view also empty
• Go to welcome page and back to project
• -> views looking correct now
• Issue does not reproduce for me if my starting workspace is e.g. 3D Advanced