Group combines objects, but users can not copy or drag as a group, only as individual objects ( Classic Menu Enabled))

Regression breaking annotation group binding and mouse interaction in Classic View

Product / Version: Adobe Acrobat Desktop 26.1.21677.0
Interface Mode: Classic Menus Enabled (Modern Layout Disabled)
Operating System: Windows / macOS (Enterprise Managed Environment)

Issue Summary:
A critical regression introduced in a recent software update completely breaks the physical bounding box and coordinate synchronization of grouped drawing annotations. While the Group command applies the metadata tag successfully in the background backend ledger, the software's active layer fails to bind the shapes spatially. The mouse pointer treats elements as individual objects, and attempts to ungroup trigger a severe interface rendering freeze (ghost selection loop).

Steps to Reproduce:

1. Open any unflattened PDF document using the Classic Menus interface layout.
2. Select the standard Select Tool (Pointer Arrow).
3. Draw multiple vector comment shapes (such as lines, rectangles, polygons) on a single page.
4. Draw a selection marquee around all shapes, right-click, and select Group.
5. Observe that the bounding box appears and the Group property is checked.
6. Attempt to left-click and drag the grouped object across the page layout, or press Ctrl+C / Ctrl+V to duplicate the selection.
7. Attempt to right-click the group and choose Ungroup, then click a blank white space on the page. 

Expected Result:

• Dragging and Copying: The shapes should lock relative to their shared bounding container and move cleanly across document coordinates as a single, absolute unit.
• Ungrouping: The selection boundary should drop, releasing focus back to standard document navigation tools.

Actual Result:

• Dragging and Copying: Acrobat completely ignores the group metadata link. The cursor targets and extracts only the single individual vector line or border piece that the mouse physically clicked on first, pulling it away from the rest of the cluster.
• The Ungroup Freeze (Ghost Selection Loop): Selecting Ungroup breaks the background tracking completely. The visual selection boundaries freeze on-screen as active highlights. The mouse cannot deselect the objects, click blank page spaces, or interact with other tools or text without the frozen shapes following or hijacking the inputs.

Impact on Workflow:
This regression blocks enterprise markup workflows, preventing heavy design, engineering, or legal review users from organizing annotations. Because this is a managed corporate machine environment governed by strict network administration rules, rolling back to previous stable versions is locked out. Non-destructive standard workarounds (like Edit Object, Cut and Paste, and keyboard arrow shortcuts) are completely bypassed or ignored by this specific bug. Destructive flattening methods (like Print to PDF) are entirely unacceptable as they ruin the original background drawing integrity.