Environment:

OS: Windows (PC)
InDesign Version: 21.0 x64
Hardware: Dual-monitor setup

Issue:
After the latest major update, InDesign no longer supports spanning the application window across two monitors. When attempting to resize the window to cover both screens, the UI automatically snaps back to a single-monitor configuration.
Expected Behavior:
The application should allow the window to extend across multiple monitors, as was possible in previous versions.
Observed Behavior:

InDesign reverts to one monitor when stretched across two.
Adobe Illustrator and Photoshop continue to support multi-monitor spanning without issue.

Question:
Has there been a change in multi-monitor support or window management in the latest release? Please advise on any configuration settings or workarounds.