This is probably a minor thing, but I have noticed this on my app and your demo.
When you open an app and click on the style selector for the first time there is a momentary flash, then a slight (but significant) hesitation and finally it will open. I find by reflex that I click again sometimes feeling that i did not click it properly.
Now, subsequent clicking actions on the style selector do not produce this behaviour. It opens immediately.
Is this an expected behaviour?
Thanks.