Hoya sigillatis Continues to Exasperate!

This plant has been vexing me for a number of years and I keep saying I’m going to get rid of it, yet I still have it.  Hoya sigillatis loses so many leaves every time it gets moved; it drives me nuts.  I have to move it outside in the summer and into a grow tent in the winter, because I have no window where it would stay happy.