For now, please include the State abbreviation at the end of the Suburb so the routing won’t get confused. When the Waze development team eventually get around to switching on Australia, we can request from Waze admin a bulk clean up of State names, rather than us picking up the pieces.
But only add “, TAS” to places where there are two or more places with the same name in all of Australia. This will mean less work in the future. Cheers.