On Ubuntu (X11 session), the Microsoft Edge print preview dialog appears blank

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On Ubuntu (X11 session), the Microsoft Edge print preview dialog appears blank

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On Ubuntu (X11 session), the Microsoft Edge print preview dialog appears blank/white when invoking print via Ctrl+P or Menu → Print. The preview pane remains empty and never renders content, preventing users from saving pages as PDF or printing to any printer — including virtual ones like PDF or CUPS-PDF.

Despite CUPS being active and system-level printing working (lp -d PDF successfully generates a PDF in ~/PDF/), Edge’s print UI fails to render the document preview.

Environment:

OS: Ubuntu (e.g., 24.04 LTS)
Session Type: x11 (confirmed via echo $XDG_SESSION_TYPE)
Microsoft Edge Version: Version 143.0.3650.96 (Official build) (64-bit)
Install Source: .deb from Microsoft
CUPS Status: Running (systemctl status cups shows active)
Printer Drivers: printer-driver-cups-pdf installed (dpkg -l | grep printer-driver-cups-pdf)
Available Printers (from lpstat -p):
printer PDF is idle. enabled since ...
printer CUPS-PDF is idle. enabled since ...
Reproduction Steps:

Open Microsoft Edge and navigate to any web page (e.g., Gmail inbox).
Press Ctrl+P or go to Menu → Print.
The print dialog opens, but the preview area stays blank/white.
Selecting “Save as PDF”, PDF, or CUPS-PDF does not trigger rendering.
Expected Behavior:
Preview should display the current page and allow selection of save/print options.

Actual Behavior:
Blank preview; no rendering occurs. Printing/exporting is effectively blocked.

Troubleshooting Already Performed:

Confirmed CUPS service is running and printers are enabled.
Verified that lp -d PDF produces a valid PDF file in ~/PDF/.
Tested in InPrivate mode and with extensions disabled — no change.
Logged out and used “Ubuntu on Xorg” session — still broken.
No Wayland sandboxing issues (session type is x11).
Impact:
Users cannot export emails, articles, or documents as PDFs from Edge, despite working system-wide printing.

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Also tried on Ubuntu(wayland) and the issue is the same.