  We analyzed TESS data of the IW And-type dwarf nova ST Cha during ordinary
dwarf nova states. We have identified an orbital period of 0.285360(1) d. The
object was reported to be eclipsing in the past using the data obtained in the
1970s, which is not in agreement with the present data. Despite the constant
mean brightness, the strength of the orbital signal varied significantly,
suggesting that the strength of the orbital signal does not always reflect the
mass-transfer rate. During an outburst with a shoulder, we did not find
evidence of humps recurring with a period longer than the orbital period which
were recorded in V363 Lyr. This finding strengthens the idea that V363 Lyr is
an unusual object. We found that the strength of the orbital signal increased
after an outburst with a shoulder. This outburst may have changed the state of
the disk and the hot spot became more apparent. Such a change in the disk may
have triggered a transition from an ordinary dwarf nova-type state to an IW
And-type state and this possibility would require further examination.
