Left menu disappears in some settings

This problem shows up in System Settings wherever the left menu has submenus (>). After selecting, say, General Behavior or Display Configuration, the left menu is functional but has no contents. I have tried varying themes and it remains a problem. Any ideas?

Kernel: 5.16.11-1-MANJARO-ARM aarch64 bits: 64 compiler: gcc v: 11.2.0
Desktop: KDE Plasma 5.24.2 Distro: Manjaro ARM base: Arch Linux
Type: ARM System: Pine64 Pinebook Pro details: N/A serial:


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