If I understand the datasheet correctly:
"The FUSB302 has the capability to do autonomous
DRP toggle. In autonomous toggle the FUSB302
internally controls the PDWN1, PDWN2, PU_EN1 and
PU_EN2, MEAS_CC1 and MEAS_CC2 and implements
a fixed DRP toggle between presenting as a SRC and
presenting as a SNK. Alternately, it can present as a
SRC or SNK only and poll CC1 and CC2 continuously."
It is still attaching Rp resp Rd to CC1 or CC2 one at a time
to detect polarity, so it is still toggling, it just is not
doing dual-role toggling. This is also expected behavior for
a sink, a sink may not present Rd on both CC pins at the
same time, otherwise the source cannot detect the polarity
and the source also cannot detect if Vconn is necessary.