How strange, I was going to post pics earlier regarding the same thing going on with my Catt (Burana Beauty)....the leaves have turned spotted and
black and shiny. The new growths as well....
black. I took it down earlier, put it on the table, left to go to the dentist and run some errands, came home and there was my cat chewing on my catt! Inbetween the gazillion teeth marks, you can hardly see the black spots on mine now.

Lilly cured it but good.