Local custom properties with "No editor for type" seen in Material Editor when returning from Material component file

Steps to reproduce:

• Create a 3D project
• Download and add PrincipledEx fron Contentlibrary/Materials
• Double click PrincipledEx in Material Browser to open it in Material Editor
• -> no local custom properties seen
• Right click principledEx in Navigator and choose "Edit component"
• Return to Screen01.ui.qml
• -> Material Editor shows a lot of local custom properties with "No editor for type"
• Local custom properties go away by selecting another material and then PrincipledEx again