AndreyCurious opened a new pull request, #4036:
URL: https://github.com/apache/incubator-kie-tools/pull/4036

   Fixes apache/incubator-kie-issues#2413
   
   ## What
   Custom task palette items did not receive the `onDragEnd` handler that every 
standard palette element in `BpmnPalette` uses to clear the 
`newNodeProjection`. As a result, cancelling a custom-task drag (pressing Esc, 
or releasing outside a valid drop target) left a "ghost" preview node on the 
canvas.
   
   This change passes `onDragEnd` to `CustomTasksPalette` and attaches it to 
the draggable item, mirroring the behavior of the standard palette elements.
   
   ## How to verify
   1. Open the BPMN Editor with a custom task available in the palette.
   2. Start dragging a custom task and cancel it (press Esc, or release outside 
the canvas).
   3. Before: a ghost node remains on the canvas. After: nothing is left behind.
   
   No new files and no public API change (internal prop wiring only).


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