OptimizedTab error in console...
As Sencha Architect doesn't support the 'null' config, using the OptimizedTab without an override doesn't seem to work.
I've attached an example project of it working, but I'm wondering why I get this error in the console:
I can see that the component is working by typing this into the console after each tab click:
TypeError: 'null' is not an object (evaluating 'g.getCount')
...and you can see the map component disappear just before the animation, so it seems to be working.
EDIT: I just found out that it must have been my list in one of the tabs had no store associated with it. I removed it and problem seems to be fixed!