  Contemporaneous multiwavelength observations with H.E.S.S., SALT, Fermi-LAT,
Swift, and ATOM show that the blazar PKS 1510-089 suffered a significant
decrease in its optical flux, degree of optical polarization and high-energy
gamma-ray (E > 100 MeV) flux since July 2021. Meanwhile, the X-ray and
very-high-energy gamma-ray (E > 100 GeV) fluxes remained steady throughout 2021
and 2022. The degree of optical polarization decreased to about zero in 2022,
indicating an unpolarized dominating accretion disk component in the optical-UV
domain that is completely diluting the polarized electron synchrotron
component. In this proceeding we will discuss, via theoretical SED modeling,
possible reasons for this dramatic change in the appearance of this blazar.

High Energy Astrophysical Phenomena