Transverse flow - or inflow roll as we call it in UK mil - is present across the whole speed range but it is most pronounced during the transition.
As you tilt the disc to go faster, you create an imbalance of induced flow between the front and rear of the rotor disc which leads to a roll towards the advancing side of the rotor due to phase lag.
IIRC the R22 has a pull-operated counter balance weight arrangement to relieve the lateral forces in the cruise due to inflow roll - in a real helicopter you can just use the trim
