Qt 3DS crashes when changing diffuse color for new Basic material

When new Basic material is created and applied, it is ok to define diffuse color. Changing diffuse color crashes Studio, when material is selected next time. It does not crash if material is still selected and then changing. Happens only with new Basic material & diffuse color

Steps:

• (add basic object)
• select object, material
• create new Basic material from Inspector
• change diffuse Color
• deselect
• select again
• change diffuse Color
• crashes when exiting color picker dialog