  Swift J1357.2-0933 is a black hole transient of particular interest due to
the optical, recurrent dips found during its first two outbursts (in 2011 and
2017), with no obvious X-ray equivalent. We present fast optical photometry
during its two most recent outbursts, in 2019 and 2021. Our observations reveal
that the optical dips were present in every observed outburst of the source,
although they were shallower and showed longer recurrence periods in the two
most recent and fainter events. We perform a global study of the dips
properties in the four outbursts, and find that they do not follow a common
temporal evolution. In addition, we discover a correlation with the X-ray and
optical fluxes, with dips being more profound and showing shorter recurrence
periods for brighter stages. This trend seems to extend even to the faintest,
quiescent states of the source. Finally, we discuss these results in the
context of the possible connection between optical dips and outflows found in
previous works.
