So...I've had this ponytail palm for about 20 years and it has thrived. 3 days ago, I noticed brown spots at the base of some recently emerged fronds. They have begun to droop significantly. The growth below still looks healthty and the new grown above looks perfect. I adore this plant and am afraid something systemic is starting. Any advice??? I have pics if I can figure out how to post them. New user here.

Stephen