I have a Dell Precision 7530 with Intel Wireless-AC 9260 Bluetooth Adapter and
kernel 6.4.0-150600.9.2.
Errors constantly appear when booting the system, but bluetooth works with my
headphones, although there are some audio artifacts at the beginning when
playing sound.

Mär 16 17:49:38 precision bluetoothd[1073]: Bluetooth daemon 5.71
Mär 16 17:49:38 precision bluetoothd[1073]: Starting SDP server
Mär 16 17:49:38 precision bluetoothd[1073]: src/plugin.c:plugin_init() System
does not support csip plugin
Mär 16 17:49:38 precision bluetoothd[1073]: profiles/audio/micp.c:micp_init()
D-Bus experimental not enabled
Mär 16 17:49:38 precision bluetoothd[1073]: src/plugin.c:plugin_init() System
does not support micp plugin
Mär 16 17:49:38 precision bluetoothd[1073]: src/plugin.c:plugin_init() System
does not support vcp plugin
Mär 16 17:49:38 precision bluetoothd[1073]: src/plugin.c:plugin_init() System
does not support mcp plugin
Mär 16 17:49:38 precision bluetoothd[1073]: src/plugin.c:plugin_init() System
does not support bass plugin
Mär 16 17:49:38 precision bluetoothd[1073]: src/plugin.c:plugin_init() System
does not support bap plugin
Mär 16 17:49:38 precision bluetoothd[1073]: src/plugin.c:plugin_init() System
does not support admin plugin
Mär 16 17:49:38 precision bluetoothd[1073]: Bluetooth management interface 1.22
initialized
Mär 16 17:49:38 precision dbus-daemon[1074]: [system] Activating systemd to
hand-off: service name='org.freedesktop.hostname1'
unit='dbus-org.freedesktop.hostname1.service' requested by ':1.1' (uid=0
pid=1073 comm="/usr/lib/bluetooth/bluetoothd ")
Mär 16 17:49:38 precision bluetoothd[1073]:
src/adapter.c:reset_adv_monitors_complete() Failed to reset Adv Monitors:
Failed (0x03)
Mär 16 17:49:38 precision bluetoothd[1073]: Battery Provider Manager created
Mär 16 17:49:38 precision bluetoothd[1073]:
src/device.c:device_set_wake_support() Unable to set wake_support without RPA
resolution
Mär 16 17:49:38 precision bluetoothd[1073]: Failed to clear UUIDs: Failed
(0x03)
Mär 16 17:49:38 precision bluetoothd[1073]: Failed to add UUID: Failed (0x03)
Mär 16 17:49:38 precision bluetoothd[1073]: Failed to add UUID: Failed (0x03)
Mär 16 17:49:38 precision bluetoothd[1073]: Failed to add UUID: Failed (0x03)
Mär 16 17:49:38 precision bluetoothd[1073]: Failed to add UUID: Failed (0x03)
Mär 16 17:49:38 precision bluetoothd[1073]: Failed to add UUID: Failed (0x03)
Mär 16 17:49:38 precision bluetoothd[1073]: Too small Add Device complete event
Mär 16 17:49:38 precision bluetoothd[1073]: Failed to add UUID: Failed (0x03)
Mär 16 17:49:38 precision (smartd)[1105]: smartd.service: Referenced but unset
environment variable evaluates to an empty string: smartd_opts

Looks like this is the error
https://bugzilla.kernel.org/show_bug.cgi?id=217651

Here's a fix
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=f0408f0a1998df76b64e76a05fd7ca00f266e654