Two displays appears as connected, but only one display actually is

After updating Linux to 6.10.8 from 6.10.7, additional screen (Unknown-1) appeared which is not connected. Downgrade to 6.10.7 solves the problem.

uname: Linux 6.10.8-arch1-1 #1 SMP PREEMPT_DYNAMIC Wed, 04 Sep 2024 15:16:37 +0000 x86_64 GNU/Linux

on Intel(R) Core(TM) Ultra 7 155U

lspci:

00:02.0 VGA compatible controller [0300]: Intel Corporation Meteor Lake-P [Intel Graphics] [8086:7d45] (rev 08) (prog-if 00 [VGA controller])
        Subsystem: Lenovo Device [17aa:2329]
        Flags: bus master, fast devsel, latency 0, IRQ 158, IOMMU group 0
        Memory at 4058000000 (64-bit, prefetchable) [size=16M]
        Memory at 4000000000 (64-bit, prefetchable) [size=256M]
        Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
        Capabilities: [40] Vendor Specific Information: Len=0c <?>
        Capabilities: [70] Express Root Complex Integrated Endpoint, IntMsgNum 0
        Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable+ 64bit+
        Capabilities: [d0] Power Management version 3
        Capabilities: [100] Null
        Capabilities: [110] Process Address Space ID (PASID)
        Capabilities: [200] Address Translation Service (ATS)
        Capabilities: [420] Physical Resizable BAR
        Capabilities: [320] Single Root I/O Virtualization (SR-IOV)
        Capabilities: [400] Latency Tolerance Reporting
        Kernel driver in use: i915
        Kernel modules: i915, xe

xrandr:

Screen 0: minimum 16 x 16, current 3840 x 1200, maximum 32767 x 32767
eDP-1 connected primary 1920x1200+0+0 (0x23) normal (normal left inverted right x axis y axis) 302mm x 189mm
        Identifier: 0x21
        Timestamp:  20958
        Subpixel:   unknown
        Gamma:      inf:inf:inf
        Brightness: 0.45
        Clones:    
        CRTC:       0
        CRTCs:      0
        Transform:  1.000000 0.000000 0.000000
                    0.000000 1.000000 0.000000
                    0.000000 0.000000 1.000000
                   filter: 
        RANDR Emulation: 1 
        non-desktop: 0 
                supported: 0, 1
  1920x1200 (0x23) 193.250MHz -HSync +VSync *current +preferred

Unknown-1 connected 1920x1200+1920+0 (0x23) normal (normal left inverted right x axis y axis) 508mm x 317mm
        Identifier: 0x501
        Timestamp:  20958
        Subpixel:   unknown
        Gamma:      1.0:1.0:1.0
        Brightness: 0.0
        Clones:    
        CRTC:       1
        CRTCs:      1
        Transform:  1.000000 0.000000 0.000000
                    0.000000 1.000000 0.000000
                    0.000000 0.000000 1.000000
                   filter: 
        RANDR Emulation: 1 
        non-desktop: 0 
                supported: 0, 1
  1920x1200 (0x23) 193.250MHz -HSync +VSync *current +preferred