I just renewed my personal subscription and something strange is happening which was also confirmed by another person. I open a model which flashes on the screen and than it just simply disappears with history and all. When I go to X out or close it (since at that point there isn't much I can do) the question of do I want to save the model comes up including the model. I hit cancel and lo and behold I can procced working on the model. I have this happen with other models also.
