Chrome Version: 66.0.3359.10 dev
OS: Chrome 10452.1.0

What steps will reproduce the problem?
(1) Install VS Code
(2) Start working on a file
(3) Use Alt+Tab to switch back and forth between Chrome and VS Code a few times
(4) Try using VS Code

Expected: VS Code behaves normally
Actual: VS Code acts as though a key is held down, usually Alt or an arrow key

This also affected Tilix, which at one point acted as though the Enter key was held down.