Console error: NaN

[rjahn]

Got an exception but not reproducable

react-dom.development.js:86 Warning: `NaN` is an invalid value for the `fontSize` css style property.
    at div
    at CellRenderer (http://localhost:3000/static/js/bundle.js:29623:68)
    at td
    at http://localhost:3000/static/js/bundle.js:208434:83
    at tr
    at http://localhost:3000/static/js/bundle.js:209215:83
    at tbody
    at http://localhost:3000/static/js/bundle.js:209821:83
    at table
    at http://localhost:3000/static/js/bundle.js:240713:83
    at div
    at div
    at http://localhost:3000/static/js/bundle.js:213169:52
    at div
    at UITable (http://localhost:3000/static/js/bundle.js:30867:65)
    at BaseComponent (http://localhost:3000/static/js/bundle.js:10053:69)
    at div
    at BorderLayout (http://localhost:3000/static/js/bundle.js:21168:5)
    at Layout (http://localhost:3000/static/js/bundle.js:23657:13)
    at div
    at UIPanel (http://localhost:3000/static/js/bundle.js:26992:130)
    at BaseComponent (http://localhost:3000/static/js/bundle.js:10053:69)
    at div
    at ResizeHandler (http://localhost:3000/static/js/bundle.js:5791:68)
    at WorkScreen (http://localhost:3000/static/js/bundle.js:6692:68)
    at ScreenManager (http://localhost:3000/static/js/bundle.js:6078:68)
    at ResizeProvider (http://localhost:3000/static/js/bundle.js:37649:20)
    at div
    at div
    at UIManager (http://localhost:3000/static/js/bundle.js:6276:64)
    at Route (http://localhost:3000/static/js/bundle.js:287447:29)
    at Switch (http://localhost:3000/static/js/bundle.js:287616:29)
    at PopupContextProvider (http://localhost:3000/static/js/bundle.js:40681:5)
    at AppWrapper (http://localhost:3000/static/js/bundle.js:76:68)
    at ErrorBoundary (http://localhost:3000/static/js/bundle.js:283465:37)
    at ReactUI (http://localhost:3000/static/js/bundle.js:651:68)
    at EmbedProvider (http://localhost:3000/static/js/bundle.js:37558:18)
    at AppProvider (http://localhost:3000/static/js/bundle.js:36796:76)
    at Router (http://localhost:3000/static/js/bundle.js:287119:30)
    at HashRouter (http://localhost:3000/static/js/bundle.js:285849:35)
    at MiddleMan (http://localhost:3000/static/js/bundle.js:395:29)