This only comes about if the "o" is not followed by a consonant audio. Which means you may also hear it in words like "window" ("wehn-daur"). Fall the "r" audio at the end of terms or just before consonants. Australian English is non-rhotic, which suggests the "r" sound is just https://ermav110dda3.bloggazza.com/27996197/the-5-second-trick-for-fake-aussie