Is AH Her an IW And star?
https://ui.adsabs.harvard.edu/abs/2017RAA....17...56H/abstract
Looking at the data more closely, this standstill of AH Her a shallow dip before the termination (around JD 2457165), which is different from the typical behavior of IW And stars.
vsnet-chat@ooruri.kusastro.kyoto-u.ac.jp