This is the dirty secret of EDA companies. Their software sucks. It's a function of volume. They don't have the number of customers like Microsoft/Adobe/<insert consumer SW co> does and so the level of testing and bug fixing is just abysmal. It was a rude awakening for me as a young engineer when I would click on tool sub-menu buttons of various EDA software programs find out that they did nothing. I would ask the sales person or FAE why that was and their answer was, "That's a planned feature - we put the button in their to gauge customer interest."