Crazy behaviour: Element Templates association get lost by certain actions

Hallo,

we use MicroStation Connect Edition 11. 800

We use a lot of Element Templates to define Styles incl. 3D-Pattern and 3D-Linestyles

We have noticed, that if we do the command ctrl. + c  and then ctrl + p the Element template is no more associated. Level Color and so on is all correct, but element template information itself is gone. 

We have noticed, that if we are importing a cell with element template definition, that this definition is partly gone, especially if the element is a 3D-Linestyle or 3D-Pattern. We tested this even with "merge into master". After merging the element template information is deleted. Is this a known issue?

Kind regards

Gerd Geisler