Summary: When relaunching Flipper/refreshing it while developing, where was a case, where the App Client connected, before the device was registered in Flipper. In this case, we didn't select the previously selected plugin Reviewed By: jknoxville Differential Revision: D9359779 fbshipit-source-id: 9c6f8e6bf65a46dc84c9781242b23df0ed539810