Growing Hoya leucantha Part Four

Right after this plant bloomed the second time, I noticed that the leaves no longer looked as vibrant and many of them started to yellow and fall off. I worried that I might lose the plant so I chopped it all up into multiple cuttings and put them in the propagator. The odd thing was that the roots on the specimen looked to be in good shape, so I have no idea what the problem was that caused so many leaves to fall off. Below the plant in its entirety before it went downhill: