AV1 decoding in mpv is slow after the latest stable update

mpv with aom AV1 decoder became too slow to decode 1080p 60fps video, while before it worked well even at x1.6 speed.
VLC works OK and other decoders seem to work fast with mpv, so it's something between mpv and libaom.

inxi -Fx output:

System:    Host: karol-pc Kernel: 5.6.15-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.1.0 
           Desktop: KDE Plasma 5.18.5 Distro: Manjaro Linux 
Machine:   Type: Laptop System: ASUSTeK product: X555LB v: 1.0 serial: <root required> 
           Mobo: ASUSTeK model: X555LB v: 1.0 serial: <root required> 
           UEFI: American Megatrends v: X555LB.603 date: 05/06/2016 
Battery:   ID-1: BAT0 charge: 13.2 Wh condition: 13.2/37.3 Wh (35%) 
           model: ASUSTeK ASUS Battery status: Not charging 
CPU:       Topology: Dual Core model: Intel Core i5-5200U bits: 64 type: MT MCP 
           arch: Broadwell rev: 4 L2 cache: 3072 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 17581 
           Speed: 799 MHz min/max: 500/2700 MHz Core speeds (MHz): 1: 799 2: 799 3: 799 
           4: 799 
Graphics:  Device-1: Intel HD Graphics 5500 vendor: ASUSTeK driver: i915 v: kernel 
           bus ID: 00:02.0 
           Device-2: NVIDIA GM108M [GeForce 940M] vendor: ASUSTeK driver: nouveau 
           v: kernel bus ID: 04:00.0 
           Display: x11 server: X.Org 1.20.8 driver: intel,nouveau unloaded: modesetting 
           resolution: 1366x768~60Hz 
           OpenGL: renderer: Mesa Intel HD Graphics 5500 (BDW GT2) v: 4.6 Mesa 20.0.7 
           direct render: Yes 
Audio:     Device-1: Intel Broadwell-U Audio vendor: ASUSTeK driver: snd_hda_intel 
           v: kernel bus ID: 00:03.0 
           Device-2: Intel Wildcat Point-LP High Definition Audio vendor: ASUSTeK 
           driver: snd_hda_intel v: kernel bus ID: 00:1b.0 
           Sound Server: ALSA v: k5.6.15-1-MANJARO 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
           vendor: ASUSTeK driver: r8169 v: kernel port: 4000 bus ID: 02:00.0 
           IF: enp2s0 state: down mac: 2c:4d:54:be:96:a1 
           Device-2: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter 
           vendor: AzureWave driver: ath9k v: kernel port: 4000 bus ID: 03:00.0 
           IF: wlp3s0 state: up mac: 40:e2:30:f0:d8:8d 
Drives:    Local Storage: total: 465.76 GiB used: 249.14 GiB (53.5%) 
           ID-1: /dev/sda vendor: Samsung model: SSD 860 EVO 500GB size: 465.76 GiB 
Partition: ID-1: / size: 282.94 GiB used: 249.14 GiB (88.1%) fs: ext4 dev: /dev/sda7 
           ID-2: swap-1 size: 4.00 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda6 
Sensors:   System Temperatures: cpu: 47.0 C mobo: N/A 
           Fan Speeds (RPM): cpu: 2900 
Info:      Processes: 223 Uptime: 24m Memory: 7.22 GiB used: 2.02 GiB (28.0%) 
           Init: systemd Compilers: gcc: 10.1.0 clang: 10.0.0 Shell: zsh v: 5.8 
           inxi: 3.0.37 

I don't know where to go with it, but thanks in advance!

Try to downgrade them (with the homonymous program), for starters?

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