Mpris-proxy - anyone else it stopped working recently?

Since - I suspect either this update [Stable Update] 2021-10-16 - Haskell, Python, KDE Gear, KDE Framework, Thunderbird - #2 by philm or [Stable Update] 2021-11-19 - Kernels, Gnome 41.1, Plasma 5.23.3, Frameworks 5.88, LxQt 1.0, Xorg-Server 21.1, Mesa - #379 - the media-keys (play/pause, skip, prev) of my bluetooth headset do not work anymore. I even have other bluetooth issues like devices need to switch off/on to get recognized after a fresh boot to get recognized; bluetooth dead after standby) - but the media-keys boggle me the most.
This used to work with “mpris-proxy” service. The service still runs and shows no signs of error, but still it does simply not work anymore.
I hoped that some update would fix this, but still in 2022 not working.
I suspect bluez did change something major.

When I start mpris-proxy, it looks fine:

$ mpris-proxy 
org.bluez appeared
Bluetooth Adapter /org/bluez/hci0 found
player org.mpris.MediaPlayer2.chromium.instance47513 at :1.281 found
player org.mpris.MediaPlayer2.firefox.instance1385 at :1.30 found
Bluetooth Transport /org/bluez/hci0/dev_5C_EB_68_82_46_80/sep5/fd0 found

Anyone else having the same issues?
Chipset: Intel AX200

Interesting finding: https://www.reddit.com/r/archlinux/comments/rh30r6/bluetooth_bug_regressed_in_kernel/

Increase your chances of solving your issue:

Provide Information:

System:
  Kernel: 5.15.12-1-MANJARO x86_64 bits: 64 compiler: gcc v: 11.1.0
    parameters: BOOT_IMAGE=/boot/vmlinuz-5.15-x86_64
    root=UUID=7dfb2ce2-522b-4d98-8960-2f7c493b1561 rw quiet
    mem_sleep_default=deep udev.log_priority=3
  Desktop: i3 4.20.1 info: i3bar vt: 7 dm: LightDM 1.30.0
    Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Laptop System: Dell product: XPS 13 9360 v: N/A
    serial: <superuser required> Chassis: type: 10 serial: <superuser required>
  Mobo: Dell model: 02PG84 v: A00 serial: <superuser required> UEFI: Dell
    v: 2.18.0 date: 10/07/2021
Battery:
  ID-1: BAT0 charge: 18.9 Wh (100.0%) condition: 18.9/60.0 Wh (31.6%)
    volts: 8.3 min: 7.6 model: SMP DELL TP1GT61 type: Li-poly serial: <filter>
    status: Full
  Device-1: hidpp_battery_2 model: Logitech Wireless Mouse MX Master
    serial: <filter> charge: 100% (should be ignored) rechargeable: yes
    status: Discharging
Memory:
  RAM: total: 15.23 GiB used: 11.82 GiB (77.6%)
  RAM Report:
    permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: Intel Core i7-8550U bits: 64 type: MT MCP arch: Coffee Lake
    family: 6 model-id: 0x8E (142) stepping: 0xA (10) microcode: 0xEA
  Topology: cpus: 1x cores: 4 tpc: 2 threads: 8 smt: enabled cache:
    L1: 256 KiB desc: d-4x32 KiB; i-4x32 KiB L2: 1024 KiB desc: 4x256 KiB
    L3: 8 MiB desc: 1x8 MiB
  Speed (MHz): avg: 2701 high: 2705 min/max: 400/4000 scaling:
    driver: intel_pstate governor: powersave cores: 1: 2700 2: 2701 3: 2701
    4: 2701 5: 2700 6: 2700 7: 2700 8: 2705 bogomips: 32012
  Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat arch_perfmon
    art avx avx2 bmi1 bmi2 bts clflush clflushopt cmov constant_tsc cpuid
    cpuid_fault cx16 cx8 de ds_cpl dtes64 dtherm dts epb ept ept_ad erms est
    f16c flexpriority flush_l1d fma fpu fsgsbase fxsr ht hwp hwp_act_window
    hwp_epp hwp_notify ibpb ibrs ida intel_pt invpcid invpcid_single lahf_lm
    lm mca mce md_clear mmx monitor movbe mpx msr mtrr nonstop_tsc nopl nx pae
    pat pbe pcid pclmulqdq pdcm pdpe1gb pebs pge pln pni popcnt pse pse36 pti
    pts rdrand rdseed rdtscp rep_good sdbg sep sgx smap smep ss ssbd sse sse2
    sse4_1 sse4_2 ssse3 stibp syscall tm tm2 tpr_shadow tsc tsc_adjust
    tsc_deadline_timer vme vmx vnmi vpid x2apic xgetbv1 xsave xsavec xsaveopt
    xsaves xtopology xtpr
  Vulnerabilities:
  Type: itlb_multihit status: KVM: VMX disabled
  Type: l1tf
    mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable
  Type: mds mitigation: Clear CPU buffers; SMT vulnerable
  Type: meltdown mitigation: PTI
  Type: spec_store_bypass
    mitigation: Speculative Store Bypass disabled via prctl and seccomp
  Type: spectre_v1
    mitigation: usercopy/swapgs barriers and __user pointer sanitization
  Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional,
    IBRS_FW, STIBP: conditional, RSB filling
  Type: srbds mitigation: Microcode
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: Intel UHD Graphics 620 vendor: Dell driver: i915 v: kernel
    bus-ID: 00:02.0 chip-ID: 8086:5917 class-ID: 0300
  Device-2: Microdia Integrated Webcam HD type: USB driver: uvcvideo
    bus-ID: 1-5:4 chip-ID: 0c45:670c class-ID: 0e02
  Display: x11 server: X.Org 1.21.1.2 compositor: picom v: git-dac85 driver:
    loaded: intel display-ID: :0 screens: 1
  Screen-1: 0 s-res: 5120x1440 s-dpi: 108 s-size: 1204x338mm (47.4x13.3")
    s-diag: 1251mm (49.2")
  Monitor-1: DP1-1 res: 2560x1440 hz: 60 dpi: 108
    size: 600x340mm (23.6x13.4") diag: 690mm (27.2")
  Monitor-2: DP1-8 res: 2560x1440 hz: 60 dpi: 108
    size: 600x340mm (23.6x13.4") diag: 690mm (27.2")
  OpenGL: renderer: Mesa Intel UHD Graphics 620 (KBL GT2) v: 4.6 Mesa 21.3.2
    direct render: Yes
Audio:
  Device-1: Intel Sunrise Point-LP HD Audio vendor: Dell driver: snd_hda_intel
    v: kernel alternate: snd_soc_skl bus-ID: 00:1f.3 chip-ID: 8086:9d71
    class-ID: 0403
  Device-2: Plantronics Plantronics Blackwire 3220 Series type: USB
    driver: plantronics,snd-usb-audio,usbhid bus-ID: 3-1.4:3 chip-ID: 047f:c056
    class-ID: 0300 serial: <filter>
  Sound Server-1: ALSA v: k5.15.12-1-MANJARO running: yes
  Sound Server-2: sndio v: N/A running: no
  Sound Server-3: JACK v: 1.9.19 running: no
  Sound Server-4: PulseAudio v: 15.0 running: no
  Sound Server-5: PipeWire v: 0.3.42 running: yes
Network:
  Device-1: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel bus-ID: 3a:00.0
    chip-ID: 8086:2723 class-ID: 0280
  IF: wlan0 state: up mac: <filter>
  IP v4: <filter> type: dynamic scope: global
  IP v6: <filter> scope: link
  IF-ID-1: br-dd5c4a9631d5 state: up speed: 10000 Mbps duplex: unknown
    mac: <filter>
  IP v4: <filter> scope: global broadcast: <filter>
  IP v6: <filter> scope: link
  IF-ID-2: docker0 state: down mac: <filter>
  IP v4: <filter> scope: global broadcast: <filter>
  IP v6: <filter> scope: link
  IF-ID-3: ppp0 state: unknown speed: N/A duplex: N/A mac: N/A
  IP v4: <filter> scope: global
  IF-ID-4: veth1463c7f state: up speed: 10000 Mbps duplex: full
    mac: <filter>
  IF-ID-5: veth4545e35 state: up speed: 10000 Mbps duplex: full
    mac: <filter>
  IF-ID-6: veth7030372 state: up speed: 10000 Mbps duplex: full
    mac: <filter>
  IF-ID-7: veth7806065 state: up speed: 10000 Mbps duplex: full
    mac: <filter>
  IF-ID-8: veth95f4904 state: up speed: 10000 Mbps duplex: full
    mac: <filter>
  WAN IP: <filter>
Bluetooth:
  Device-1: Intel AX200 Bluetooth type: USB driver: btusb v: 0.8 bus-ID: 1-3:3
    chip-ID: 8087:0029 class-ID: e001
  Report: rfkill ID: hci0 rfk-id: 3 state: up address: see --recommends
Logical:
  Message: No logical block device data found.
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 476.94 GiB used: 263.98 GiB (55.3%)
  SMART Message: Required tool smartctl not installed. Check --recommends
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Samsung model: PM981 NVMe 512GB
    size: 476.94 GiB block-size: physical: 512 B logical: 512 B speed: 31.6 Gb/s
    lanes: 4 type: SSD serial: <filter> rev: EXA72D1Q temp: 45.9 C scheme: GPT
  Message: No optical or floppy data found.
Partition:
  ID-1: / raw-size: 459.7 GiB size: 451.49 GiB (98.21%)
    used: 262.56 GiB (58.2%) fs: ext4 block-size: 4096 B dev: /dev/nvme0n1p2
    maj-min: 259:2 label: N/A uuid: 7dfb2ce2-522b-4d98-8960-2f7c493b1561
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
    used: 35.1 MiB (11.7%) fs: vfat block-size: 512 B dev: /dev/nvme0n1p1
    maj-min: 259:1 label: N/A uuid: E650-7DCA
  ID-3: /mnt/net/cifs/storage-intern raw-size: N/A size: 9.63 TiB
    used: 7.37 TiB (76.5%) fs: smb3 dev: /dev/intern
Swap:
  Kernel: swappiness: 60 (default) cache-pressure: 100 (default)
  ID-1: swap-1 type: partition size: 16.94 GiB used: 1.38 GiB (8.2%)
    priority: -2 dev: /dev/nvme0n1p3 maj-min: 259:3 label: N/A
    uuid: 536c5ef1-75f8-424a-9aa2-3ac94ca835b2
Unmounted:
  Message: No unmounted partitions found.
USB:
  Hub-1: 1-0:1 info: Hi-speed hub with single TT ports: 12 rev: 2.0
    speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Device-1: 1-2:2 info: Microdia Backlit Gaming Keyboard
    type: Keyboard,Mouse driver: hid-generic,usbhid interfaces: 2 rev: 2.0
    speed: 12 Mb/s power: 400mA chip-ID: 0c45:652f class-ID: 0301
  Device-2: 1-3:3 info: Intel AX200 Bluetooth type: Bluetooth driver: btusb
    interfaces: 2 rev: 2.0 speed: 12 Mb/s power: 100mA chip-ID: 8087:0029
    class-ID: e001
  Device-3: 1-5:4 info: Microdia Integrated Webcam HD type: Video
    driver: uvcvideo interfaces: 2 rev: 2.0 speed: 480 Mb/s power: 500mA
    chip-ID: 0c45:670c class-ID: 0e02
  Hub-2: 2-0:1 info: Super-speed hub ports: 6 rev: 3.0 speed: 5 Gb/s
    chip-ID: 1d6b:0003 class-ID: 0900
  Hub-3: 3-0:1 info: Hi-speed hub with single TT ports: 2 rev: 2.0
    speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Hub-4: 3-1:2 info: Dell ports: 6 rev: 2.1 speed: 480 Mb/s
    chip-ID: 413c:8442 class-ID: 0900
  Device-1: 3-1.4:3 info: Plantronics Plantronics Blackwire 3220 Series
    type: Audio,HID driver: plantronics,snd-usb-audio,usbhid interfaces: 4
    rev: 2.0 speed: 12 Mb/s power: 100mA chip-ID: 047f:c056 class-ID: 0300
    serial: <filter>
  Device-2: 3-1.5:4 info: Texas Instruments type: HID
    driver: hid-generic,usbhid interfaces: 1 rev: 2.0 speed: 480 Mb/s
    chip-ID: 0451:82ff class-ID: 0300
  Hub-5: 4-0:1 info: Super-speed hub ports: 2 rev: 3.1 speed: 10 Gb/s
    chip-ID: 1d6b:0003 class-ID: 0900
Sensors:
  System Temperatures: cpu: 60.0 C pch: 55.0 C mobo: N/A
  Fan Speeds (RPM): cpu: 3594
Info:
  Processes: 391 Uptime: 2d 2h 2m wakeups: 12 Init: systemd v: 250
  tool: systemctl Compilers: gcc: 11.1.0 clang: 13.0.0 Packages: pacman: 1813
  lib: 435 Shell: Bash v: 5.1.12 running-in: urxvtd inxi: 3.3.11

I just downgraded bluez, bluez-libs and bluez-utils to 5.61. It works not. All I can say is, 5.62 does not work. I don’t know where to to debug bluez.