The patisandhi-citta is succeeded by the first bhavanga-citta of that life and
this citta experiences the same object as the patisandhi-citta. Moreover, all
bhavanga-cittas of that life experience that object.
The 'Visuddhimagga' (XIV, 114) states with regard to the bhavanga-citta:
When the patisandhi-citta has ceased, then,
following on whatever kind of rebirth-consciousness it may be,
the same kinds, being the result of the same kamma whatever it may be,
occur as bhavanga-cittas with that same object; and again those same kinds.
And as long as there is no other kind of arising of consciousness
to interrupt the continuity they also go on occurring endlessly
in periods of dreamless sleep, etc., like the current of a river.
The bhavanga-cittas are like the current of a river and this is interrupted
when there is an object presenting itself through one of the senses or through
the mind-door. When the cittas of the sense-door process or the mind-door
process have fallen away, there is again the current of bhavanga-cittas.