The editor goes crazy when ever I try to render more then one time of film input. It could all be mp4, but if one is 1080 and another 4k, it just goes psycho with flashing images and so on. I need to make a film with MP4 and MXF but i can't do it. Anyone know what the heck is going on? I thought about upgrading but I upgraded from 15 because of all the problems only to have worse problems with 16.