Observer block

Hello. I have been playing Minecraft for a long time and have managed to build many mechanisms in my world. I test every Saturday on each of my mechanisms and a new beta 1.15.0.53. The new beta version does not work the observer if it is dragged by a sticky piston or the usual pistons it does not emit a signal. because of this, most of my mechanisms do not work. Please correct this defect. I will be very grateful to you.