Thank you everyone for your responses. For some reason, I do not receive email notifications even though it is on in my settings. I had no clue there were replies. Apologies for being almost one year late to respond! π€¦π»ββοΈ I only came back to this website because I'm still having this problem. After reading all the comments, I believe it could be a fungal issue and possibly because I don't water them enough. We also had a rough winter here in Northern California with flooding and cold, wet rainstorms.
They plant has also been in the pot for 5-6 years so maybe it's root bound? Not sure if they like that but it'll be a chore to remove as it seems pretty tightly grown in there.