The male audio for duan4 sounds like it’s saying a completely different sound, like ‘bai’ or ‘butt’.
It sounds right to me. Try it on a different device.
It still sounds wrong on my mobile device as well.
I tried all four of the voices we have (male/trad, mainland/taiwan), and they all sound fine to me. Are you using male or female voice?
The male audio. This is the file.
FWIW, I asked a few friends to guess what was being said and they heard “butt,” “bun,” and “ban” but no one said duan.
It sounds like ‘duan4’ to me. Though I’m not sure if there’s been a change since yesterday. I didn’t listen before today.