Docker Compatibility Issues
While most of Docker will continue to work fine with iTerm2, the Docker Quickstart terminal is not compatible with the latest version of iTerm2 because of changes to iTerm2's Applescript support. All applications that use Applescript to communicate with iTerm2 must be updated. Please ask Docker to update their software. They even have a fix, but they haven't merged it: https://github.com/docker/toolbox/pull/508
An unsupported workaround is available here: https://gist.github.com/gnachman/49cd5f8bcadc874ea8fc