Lovely Plant !
Inspect it to see if you see any signs of pests. You may have to actually tip the pot upside down holding in one hand and with the other ( or get someone to hold it for you) and check the undersides. I use an insecticidal soap (Gardensafe) particular as a preventative measure on any new plants whether they look like they need it or not.
I tip them upside down, spray the undersides, then right side up and spray again and let dry in a shady spot. "Most" Hoya pests will be either Aphids or Spider Mites or Mealy bugs, particularly indoors where air circulation in more limited.
