Cubasis 1.3 sneak preview!

hi, apologies in advance, if this has already been answered. I have tried reviewing the doc, and it is not clear to me.
With the new flac import/export into cubasis1.3 … (q) does cubasis operate natively in flac, or does it have to always convert the flac files t .wav in order for them to be accessible in MediaBay so that they can be utilised?
(my flac files seem to alway get converted to .wav …)
thanks in advance
regards,
/Stef