SUMMARY
Bluetooth applet (Bluedevil) displays duplicate entries for previously paired devices after suspend/resume cycles. Duplicate entries accumulate across multiple suspend/resume events.

STEPS TO REPRODUCE
1. Pair one or more Bluetooth devices (headphones are easiest to reproduce with).
2. Suspend the system.
3. Resume the system.
4. Open the Bluetooth applet from the Plasma system tray.
5. Observe: device list now contains duplicated entries (often with “hci0” appended).
6. Repeating suspend/resume leads to additional duplicates.

OBSERVED RESULT
- After resume, Bluetooth devices appear multiple times in the Plasma applet.
- Duplicated items increase with each suspend/resume cycle.
- Restarting plasmashell removes the duplicates temporarily.

EXPECTED RESULT
- Each paired device should appear once in the Bluetooth applet.
- Suspend/resume should not create additional UI entries.

SOFTWARE/OS VERSIONS
Operating System: Kubuntu 25.10
KDE Plasma Version: 6.5.3 and 6.4.x
KDE Frameworks Version: 6.20.0
Qt Version: 6.9.2
Kernel Version: 6.17.0-6-generic (64-bit)
Graphics Platform: X11
Bluez version: 5.83
Pipewire version: 1.4.7
Bus 001 Device 003: ID 8087:0aaa Intel Corp. Bluetooth 9460/9560 Jefferson Peak (JfP)


ADDITIONAL INFORMATION
Discussion on Reddit: https://www.reddit.com/r/kde/comments/1nopvt3/kde_bluetooth_applet_shows_dupe_devices_after/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

Potentially related KDE bugs:
Bug 497353 – adapter power state restore issues
Bug 445376 – previously fixed logout/login state restore issue
Bug 469119 – inconsistent restoration of Bluetooth state