D6000 1 of 4 external display setup not connected in clamshell mode

[r24]

I’m experiencing an issue using DisplayLink with macOS Sequoia 15.5 on a MacBook Pro (M1 Pro). Everything worked perfectly until recently.

Setup:
• DisplayLink Manager: 1.12.4 (Build 90)
• macOS: Sequoia 15.5
• MacBook Pro M1 Pro – 16-core GPU
• Displays:
• LG HDR 4K (6016×3384)
• LG ULTRAGEAR+ 4K (3840×2160 @ 120Hz)
• Samsung S34CG50 Ultrawide (1440×3440 @ 100Hz) – via DisplayLink
• LG Ultrawide (1440×3440 @ 50Hz) – via DisplayLink
• Built-in Liquid Retina XDR (3456×2234)

Issue:

When the MacBook lid is open, all 5 displays (including the 2 DisplayLink-powered ultrawides) work perfectly.

However, when I close the lid to enter clamshell mode:
• The two DisplayLink displays disappear
• Only three monitors remain active

This began recently. I’ve confirmed that:
• All permissions (Screen Recording, Accessibility) are enabled
• The DisplayLink Manager app is running
• All monitors are initialized before closing the lid
• I’ve tried toggling the “Power save all displays and sleep in clamshell” setting with no change

Is this a known issue with clamshell handling in version 1.12.4 or macOS Sequoia?
Are there any recommended workarounds or diagnostic logs I can provide to help resolve this?
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Apple M1 Pro:

Chipset Model: Apple M1 Pro
Type: GPU
Bus: Built-In
Total Number of Cores: 16
Vendor: Apple (0x106b)
Metal Support: Metal 3
Displays:
Color LCD:
Display Type: Built-in Liquid Retina XDR Display
Resolution: 3456 x 2234 Retina
Main Display: Yes
Mirror: Off
Online: Yes
Automatically Adjust Brightness: No
Connection Type: Internal
LG ULTRAGEAR+:
Resolution: 3840 x 2160 (2160p/4K UHD 1 - Ultra High Definition)
UI Looks like: 3840 x 2160 @ 120.00Hz
Mirror: Off
Online: Yes
Rotation: Supported
Television: Yes
LG ULTRAWIDE:
Resolution: 1440 x 3440
UI Looks like: 1440 x 3440 @ 50.00Hz
Mirror: Off
Online: Yes
Rotation: 90
S34CG50:
Resolution: 1440 x 3440
UI Looks like: 1440 x 3440 @ 100.00Hz
Mirror: Off
Online: Yes
Rotation: 270
LG HDR 4K:
Resolution: 6016 x 3384
UI Looks like: 3008 x 1692 @ 60.00Hz
Mirror: Off
Online: Yes
Rotation: Supported


***Issue*** Apple M1 Pro (Clamshell Mode):

Chipset Model: Apple M1 Pro
Type: GPU
Bus: Built-In
Total Number of Cores: 16
Vendor: Apple (0x106b)
Metal Support: Metal 3
Displays:
LG HDR 4K:
Resolution: 6016 x 3384
UI Looks like: 3008 x 1692 @ 60.00Hz
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
LG ULTRAGEAR+:
Resolution: 3840 x 2160 (2160p/4K UHD 1 - Ultra High Definition)
UI Looks like: 3840 x 2160 @ 120.00Hz
Mirror: Off
Online: Yes
Rotation: Supported
Television: Yes
S34CG50:
Resolution: 1440 x 3440
UI Looks like: 1440 x 3440 @ 100.00Hz
Mirror: Off
Online: Yes
Rotation: 270

[mjaroch]

Hello r24,

Thank you for taking the time to share your issue.

To gain further insights and investigate this behavior in detail, we kindly ask you to contact our support team directly. They will be able to analyze your case more thoroughly and guide you through the next steps.
Here is how to gather logs and send it to our support.