Since the Default MFD update, the radar screen has an small bug. Things in front of me are shown behind me and vice versa. Sorry i don't know how to describe it, my English lessons at school are 25 years ago. I hope the screenshots will help you to understand. On the left side is the new MFD Default radar, on the right is the old one. As you can see, the old version shows an collision warning for the mountain in front of me, the new one not. I've uploaded several screenshots more, i hope that will help.