[13.0.0-beta.5] dragged block briefly teleports to original parent's bbox when crossing snap radius (pointer drag)

[microbit-matt-hillsdon]

Check for duplicates

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

Description

Screen.Recording.2026-05-19.at.13.34.06.mov

I think this applies to all connection types.

The second drag in the video is slower and you can clearly see the teleported position.

Reproduction steps

1. Drag blocks apart very slowly
2. Note unexpected position for 1 frame

At higher speeds this just feels like a weird glitch.

Priority

In core/dragging/block_drag_strategy.ts updateConnectionPreview has a "no-candidate" branch that calls draggingBlock.moveDuringDrag(destination) where destination is computed from the previously-connected block's root bbox. This is intended for keyboard moves but runs for all move types causing this one time jump at the snap radius.

Stack trace

Screenshots

No response

Browsers

No response