Tooltip.js:248 Uncaught TypeError: Cannot read property 'relatedTarget' of undefined
    at constructor.handleTargetOut (Tooltip.js:248)
    at constructor.onTargetOver (ext-all-debug.js:205811)
    at constructor.callParent (ext-all-debug.js:13104)
    at constructor.onTargetOver (ext-all-debug.js:206272)
    at constructor.callParent (ext-all-debug.js:13104)
    at constructor.onTargetOver (Tooltip.js:218)
    at constructor.fire (ext-all-debug.js:21913)
    at constructor.fire (ext-all-debug.js:36708)
    at constructor.publish (ext-all-debug.js:36668)
    at constructor.publishDelegatedDomEvent (ext-all-debug.js:36690)