Dropping a semantic element from the Explorer on a diagram can create the corresponding node elsewhere

[pcdavid]

Steps to reproduce

1. Create a diagram with (only) a Package visible on it.
2. From the Explorer, create e sub-element inside the Package, e.g. an AttriuteDefinition.
3. Drop the new AttributeDefinition from the Explorer onto the diagram's background (not inside the Package container).

Expected result

Nothing, except maybe a message; this semantic element can not be represented where the user dropped.

Actual result

A node for the AttributeDefinition is created and revealed inside the Package container node, which is where the semantic element exists, but not where the user dropped.

Capture.video.du.2026-03-17.10-40-03.mp4