Seen on master running locally:
Disabling plugins emits the following error logs, and keeps stacking for every plugin disabled:
1. Start from fresh instance of server with no plugins.
2. Launch Marketplace and install some plugins.
3. Once installed, enable them.
4. Disable the plugins.
Expected: Plugins get disabled gracefully.
Observed: Plugins emit "connection is shut down" error upon disabling. (See full error log in description.)