I've been having the same problem when using Adobe Camera Raw... I can only assume it's an issue that will be fixed with an update. I have no idea why it's happening, though, or what, if anything, can be done to prevent it. It's supremely annoying.
I did have a similar problem on my old computer. The graphics processor was a low end one and would not handle lightroom. I had to turn it off. Problem went away. I have a Nvidia GeForce GTX 960 with 4GB of RAM in the new system and it works with no problem.