ExtJS ToolTip width on OS X

Hi:

I'm currently struggling with the Tooltip been shown with a width of 40px in OSX.

This is same as the following post on stackoverflow by another person.

http://ift.tt/1xHk74m

It seems if I create the tooltip manually via Ext.create the width is auto adjusted.

I'm using the latest sencha CMD 5.1.0.26

Any ideas?

J.

ExtJS ToolTip width on OS X