Reproduction steps:
1. Open project "case_1340352-MurderMystery.zip"
2. In the Project window, open Scene "Scene0"
3. Open the Tile Palette in Window > 2D > Tile Palette
4. Select tool "Erase with active brush" from Tile Palette
5. Make sure Tile in (67, 8, 0) and Tile (86, 31, 0) are visible in Scene view
6. Erase Tile (67, 8, 0)
7. Observe Tile (86, 31, 0)

Expected result: Tile selected is removed
Actual result: Tile selected and other Tiles are removed

Reproducible with: 1.0.0 (2019.4.28f1, 2020.3.12f1)
Not reproducible with: 1.0.0 (2021.1.0a1, 2021.1.11f1, 2021.2.0a21)
Could not test with: 2018.4.36f1 (Project doesn't compile properly and can't see Tiles Sprite)

Notes:
- This doesn't happen when disabling Composite Collider 2D