Steps to reproduce:

1. Create and open a new 2D project
2. Import any Tilemap set from the asset store
3. Select any Tilemap Prefab in the Project
4. Open the Tile Palette window
5. Create a Tilemap GameObject in the Hierarchy
6. Change to Line Brush
7. Sample any non-empty tile
8. Press on the "Brush" tool
9. Click anywhere on the grid in the Scene view
10. Press the ESC key, or right-click the mouse (anything expected to cancel the drawing action)
11. Observe the Scene view

Actual results: The drawing action does not end

Expected results: The drawing action is ended with a right-mouse click or an ESC key press

Reproducible with versions: 2023.1.0a1, 6000.0.72f, 6000.3.13f1, 6000.4.3f1, 6000.5.0b4, 6000.6.0a2

Tested on (OS): Windows 11 Pro (25H2)

Notes:

• The change can be undone with CTRL+Z, that's a quick workaround