AMD GPU: Zero Fan Mode Stopped Working

TL;DR: zero fan mode stopped working for my AMD RX580. Last thing I remember doing was installing sway, but under another user account. How can I get zero fan mode back?

Some days ago I wanted to try out swayWM. I created another user account and installed in in there, to avoid possible confusions of different profiles / settings.
It might not be related to my issue - it is just the last thing I remember doing, before my AMD GPU stopped turning off the fan completely (zero fan mode). Now, it is running at 803 rpm all the time. I tried going back to kernel 5.8, as I remember that I updated to this kernel version much earlier than the issues arose, but I updated to 5.9 more recently. It had no effect on my GPU fan. Also, going to 5.10 rc2 had no effect.

How can I get automatic fan control back to work, including switching off the fans completely? Thank you very much in advance!

Here is my system config for further details:

~ >>> inxi -F                                                                  
  Host: KLArch Kernel: 5.10.0-1-MANJARO x86_64 bits: 64 
  Desktop: GNOME 3.38.1 Distro: Manjaro Linux 
  Type: Desktop System: Gigabyte product: X570 AORUS ULTRA v: -CF 
  serial: <superuser/root required> 
  Mobo: Gigabyte model: X570 AORUS ULTRA v: x.x 
  serial: <superuser/root required> UEFI: American Megatrends v: F11 
  date: 12/06/2019 
  Info: 16-Core (2-Die) model: AMD Ryzen 9 3950X bits: 64 type: MT MCP MCM 
  L2 cache: 8192 KiB 
  Speed: 3594 MHz min/max: 2200/3500 MHz Core speeds (MHz): 1: 2959 2: 2125 
  3: 2196 4: 2194 5: 2196 6: 2195 7: 2195 8: 2196 9: 2317 10: 1953 11: 1947 
  12: 1925 13: 2125 14: 2194 15: 2192 16: 2188 17: 2195 18: 2196 19: 2192 
  20: 2196 21: 2194 22: 2194 23: 2197 24: 2126 25: 2195 26: 2195 27: 2194 
  28: 2192 29: 2196 30: 2196 31: 2195 32: 2198 
  Device-1: AMD Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] 
  driver: amdgpu v: kernel 
  Display: wayland server: X.Org 1.20.9 driver: modesetting resolution: 
  1: 1920x1080~60Hz 2: 1920x1200~60Hz 3: 1920x1080~60Hz 
  OpenGL: renderer: Radeon RX 580 Series (POLARIS10 DRM 3.40.0 
  5.10.0-1-MANJARO LLVM 10.0.1) 
  v: 4.6 Mesa 20.2.1 
  Device-1: AMD Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590] 
  driver: snd_hda_intel 
  Device-2: AMD Starship/Matisse HD Audio driver: snd_hda_intel 
  Device-3: Audio-Technica AT2020USB+ type: USB 
  driver: hid-generic,snd-usb-audio,usbhid 
  Device-4: Logitech Webcam C210 type: USB driver: snd-usb-audio,uvcvideo 
  Sound Server: ALSA v: k5.10.0-1-MANJARO 
  Device-1: Intel I211 Gigabit Network driver: igb 
  IF: enp5s0 state: down mac: b4:2e:99:aa:4e:0d 
  Device-2: Intel Ethernet 10G X550T driver: ixgbe 
  IF: enp10s0f0 state: up speed: 10000 Mbps duplex: full 
  mac: a0:36:9f:b3:28:ec 
  Device-3: Intel Ethernet 10G X550T driver: ixgbe 
  IF: enp10s0f1 state: down mac: a0:36:9f:b3:28:ed 
  IF-ID-1: virbr0 state: down mac: 52:54:00:1a:87:cf 
  IF-ID-2: virbr0-nic state: down mac: 52:54:00:1a:87:cf 
  Local Storage: total: 1.93 TiB used: 485.23 GiB (24.6%) 
  ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 970 EVO Plus 1TB 
  size: 931.51 GiB 
  ID-2: /dev/nvme1n1 vendor: Samsung model: SSD 970 EVO Plus 1TB 
  size: 931.51 GiB 
  ID-3: /dev/sda vendor: Western Digital model: WDS120G2G0A-00JH30 
  size: 111.79 GiB 
  Device-1: md127 type: mdraid status: active raid: raid-10 report: 2/2 UU 
  Components: online: nvme0n1p2~c0 nvme1n1p2~c1 
  ID-1: / size: 844.61 GiB used: 485.23 GiB (57.5%) fs: ext4 
  dev: /dev/md127p1 
  Alert: No Swap data was found. 
  System Temperatures: cpu: 52.0 C mobo: N/A gpu: amdgpu temp: 39.0 C 
  Fan Speeds (RPM): N/A gpu: amdgpu fan: 807 
  Processes: 563 Uptime: 12m Memory: 62.80 GiB used: 2.73 GiB (4.4%) 
  Shell: Zsh inxi: 3.1.08