Pulling leaves are a warning
If leaves detach easily from the center, the plant may be rotting from the base or crown. A few dry outer leaves are normal aging, but a loose center is more serious.
Check watering history
Recent soaking followed by poor drying is a common pattern. Closed terrariums, shells, tight cups, and wet decorative filler can keep moisture around the base long after the leaves look dry.
Separate normal shedding
A single old outer leaf drying and peeling away is not the same as the whole plant falling apart. Look at whether the remaining plant is firm, green or silver, and attached strongly at the center.
Act quickly
Remove the plant from the display, stop soaking until you inspect it, and let it dry in bright airflow. If any firm healthy tissue remains, adjust the routine and monitor closely.
Check for a sour smell
Rot often has a sour or unpleasant smell near the base. Smell is not the only test, but it can confirm that falling apart is more than simple dryness.
Avoid rescue overwatering
If the center is loose or mushy, more soaking will not help. Focus on drying, airflow, and deciding whether any firm living tissue remains.
Prevent it next time
Water outside the display, shake out hidden droplets, and choose holders that let you see the base. Falling apart is easier to prevent than reverse once rot is advanced.
Protect nearby plants
If one plant fell apart in a shared terrarium or arrangement, inspect the others. The display or watering routine may be creating the same risk for the whole group.