Houseplant clinic: has my yucca been overwatered?

Yuccas are drought-tolerant, so excess moisture can lead to stress or root rot

What’s the problem?
My daughter has a yucca plant on her landing, and while the lower side looks fine, the taller side is struggling. She suspects her partner might have overwatered it. Any advice?

Diagnosis
Yuccas are drought-tolerant and sensitive to overwatering, and yellowing leaves, soft areas on the trunk or drooping stems are all indicators of this. Excess moisture often leads to stress or root rot. This may explain why the taller side, which perhaps has deeper roots so sits in wet soil longer, is suffering more noticeably.