DaVinci Studio 20 public beta3 AI mixing audio

I tried AI mixing audio (for YouTube), but it worked for a short timeline, but not long version.
Specifically, Voice ISO, Dialogue lev, De-Esser applies for my short timeline. However, the long one has only leveling changed. On Fairlight page, Voice ISO and Dialoge Lev are off, no matter how many times I tried.
Specifically, Voice ISO, Dialogue lev, De-Esser applies for my short timeline. However, the long one has only leveling changed. On Fairlight page, Voice ISO and Dialoge Lev are off, no matter how many times I tried.