Hello, the position class seems cannot place together with container.
Without container:
const WebNav = tw.nav`relative flex justify-between items-center mx-auto`
The position class is applied:

With container:
const WebNav = tw.nav`relative container flex justify-between items-center mx-auto`
The position class disappear:

Thanks for the report.
There will be a bugfix in the next version due within the next week 馃憤
Fixed in 1.0.0 馃帀