Bad delete area detection when zoomed

[mikeharv]

Check for duplicates

• I have searched for similar issues before opening a new one.

Description

When zooming in on the workspace, blocks that are not touching a delete area, but are near one, can be deleted. This is most evident in mutator workspaces due to their size.

Reproduction steps

1. Zoom in a few steps on the Blockly Playground workspace.
2. Add a controls_if block to the workspace and open its mutator.
3. Drag a controls_if_elseif block from the mutator flyout to the stack.

An insertion marker is shown as well as delete styling on the cursor. Releasing the block causes it to be deleted as it is connected.

Priority

No response

Stack trace

Screenshots

Screen.Recording.2026-06-26.at.2.46.32.PM.mov

Browsers

No response