Issues with shadow blocks selection

[LappiLappland]

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Description

If you hold shift and press on a block's shadow block input, then the main block gets selected and then immediately deselected

Also if you select main block and then select shadow block, the selected blocks visually is shown as selected, but logically it is not. This happens only if you select a single block

Reproduction steps

1. Hold shift and click on shadow block

2. Block gets visually selected and then deselected

3. Select block

4. Hold shift and select shadow block inside

5. Observe flicker of block

6. Hit "Delete" shortcut

7. Block does not get removed and selection immediately dissapears

Stack trace

Screenshots

issue 1

issue.1.mp4

issue 2

issue.2.mp4

Browsers

No response

[mjgallag]

@LappiLappland would love a PR!