  Using VSNET, VSOLJ, ASAS-SN and ATLAS observations, I found that the Z Cam
star PY Per spent a long, faint low state reaching 19.1 mag at least between
2022 June and November. No dwarf nova outburst was recorded during this
interval. TESS data during this low state showed two maxima in one orbital
cycle and can be interpreted as an ellipsoidal modulation arising from the
secondary. These observations suggest that the mass-transfer almost stopped
during this low state and strengthen the identification of PY Per as a VY Scl
star. PY Per had shown an unusual outburst resembling an SU UMa-type
superoutburst less than half a year before (Kato 2022, arXiv:2204.12056) and
these phenomena may have been physically related.
