Copy problems: Copy many assets from board to board not working anymore

Since three weeks I have the problem that I can not copy paste miro elements (frames, assets) from one board to another board in my payed account anymore. Before I was able to select the items and copy paste them. Maybe this is due to the AI integration. If I select numerous frames the copy option does not even show anymore. 

For workflow this is a real problem: I am copying content for workshops in large quantities from board to board. The current situation is very time consuming. Looking for a fix.