odd behaviour overdubbing audio track !?

i recorded a 6 channel live with my UR44 and the take was fine, then i wanted to record the singer again (on the same track he already recorded) but when i record that track i can hear the previous recorded “lane” as well !!
its a bug or i need to configure something ? (didnt find anything relevant )

Cubasis differs from Cubase here and plays back the previous track while recording an additional track.
In case of overdubs please create a new audio track and mute the previous one.

thanks for clear this !
well is it somehow to our benefit ? why it should work like that really and be different from cubase in that regard ?

We have it on our list but since this will be no easy task do not expect it to be available short-term.