I was trying to create a "Custom Fleet" for the necrons. I chose the ships, and wrote a name for the fleet calling it "Harvest Fleet" when I clicked to create it the game froze.
Not only that, I noticed my computer began to slow down, to the point it took it several minutes to open the task manager. Once the Task Manager was loaded I could see the game had 14+ GB of Memory Usage, clogging my entire system. The moment I terminated the application my Memory usage went from 99% to 11%. I currently have 16 GB of RAM.
Here is an image of the frozen screen, the mouse was stuck on the save button. I play in 1600x900 windowed mode. (not borderless)