Electron `chrome --type=renderer --field-trial-handle=...` won't shut down, eats up Memory

I am trying to build an app with electron. When I do this, however, it appears that several chrome processes are created that don’t shut down after closing electron. These processes eat up a lot of memory that slow down my computer. Most of the processes are called something like chrome --type=renderer --field-trial-handle=....

They occur even when I try to run the electron quick start app. I cannot figure out a way to stop these processes besides restarting the computer.

Here is a screenshot of these processes from my system monitor:

This is what happens when I try to end the process. Some sort of weird non-functioning dialogue box pops up:

Questions.

1. Is this problem in fact created by electron?
2. Is there a way to shut these down within electron (e.g. via a flag)?
3. Is there a way to shut these processes down without restarting?
4. Would it just be better to submit an issue to the electron repo?

Info.

• OS: Ubuntu 16.04 LTS
• Electron Version: v1.7.9
• Chrome Version: Version 61.0.3163.100 (Official Build) (64-bit)

~/.config/google-chrome/Default/Application Cache