Are there planets around hot subdwarf stars?

Hot subdwarfs experienced strong mass loss on the red giant branch (RGB) and are now hot (20,000-40,000 K) and small (0.1-0.3 Rsun) stars. These objects are in a phase of He-burning that will last for about 100 Myr, and then will directly evolve into white dwarfs. These stars constitute excellent targets for addressing the question of the evolution of exoplanetary systems directly after the RGB phase of evolution. Their small sizes make them particularly suited for transit surveys to search for small, close-in planets or planetary remnants. The short lives of hot subdwarfs make the formation of second-generation planets less likely to be observed.
To date, several planet detections around hot subdwarfs have been claimed (by pulsation-timing and eclipse-timing variations, by radial velocities and by phase curves observed by Kepler), but none of them received confirmation.
In this talk I will review the tentative planets claimed around hot subdwarfs, and I will present first results of an ongoing transit survey in all light curves of hot subdwarfs observed from space-based telescopes (Kepler, K2, TESS, and CHEOPS). The goal is to compute meaningful statistics on two points: firstly, the occurrence rates of planets around hot subdwarfs, and secondly, the probability of survival for close-in planets engulfed during the RGB phase of their host star.