Hi All,

Tooltips do not work on the second series with error in console:

Uncaught TypeError: Cannot read property 'bbox' of undefined
at constructor.getBBox (https://cdn.sencha.com/ext/commercia...bug.js:4405:25)
at constructor.getBBoxFor (https://cdn.sencha.com/ext/commercia...bug.js:7776:25)
at constructor.showUntracked (https://cdn.sencha.com/ext/commercia...ug.js:27066:41)
at constructor.onMouseMoveGesture (https://cdn.sencha.com/ext/commercia...ug.js:27034:32)
at constructor.chart.addElementListener.me.listeners.(anonymous function) (https://cdn.sencha.com/ext/commercia...ug.js:16986:65)
at constructor.fire (https://cdn.sencha.com/ext/commercia...ug.js:21913:42)
at constructor.fire (https://cdn.sencha.com/ext/commercia...ug.js:36708:27)
at constructor.publish (https://cdn.sencha.com/ext/commercia...ug.js:36668:28)
at constructor.publishGestures (https://cdn.sencha.com/ext/commercia...ug.js:37388:16)
at constructor.onTouchMove (https://cdn.sencha.com/ext/commercia...ug.js:37539:12)