Menu tree not behaving correctly.
Opened Chrome Developer Tools and saw the following warnings…
DevTools failed to parse SourceMap: http://127.0.0.1:8088/res/perspective/css/PerspectiveClient.css.map
react-dom.development-16.4.2.js:18362 Download the React DevTools for a better development experience: https://fb.me/react-devtools
DevTools failed to parse SourceMap: http://127.0.0.1:8088/res/perspective/css/PerspectiveAmCharts.css.map