I've installed VS Code in Ubuntu 14.04 LTS. When using it, it always sits on top of other windows. Not only does it sit on top of other applications like the terminal, it also sits on top of its own dialogs (like for opening a file):

Is there some sort of weird interaction between the API that VS Code is using and the X server that might be causing this? How can it be fixed?
Note that this is not the same as this question, which concerns Visual Studio (not VS Code) on Windows.