On editing Tile Palette, cell selection box highlighter appears in Tilemap in the Scene View, Refer attached video

Steps to repro:
1. Open attached project(2D.Zip)
2. Hierarchy > Grid > Tilemap
3. Window > 2D > Tile Palette
4. Tile Palette > Edit > Make changes in Tile Palette
5. Observe Tilemap while making changes in the Tile Palette

Actual Result:
Cell selection box appears in the Tilemap while editing the Tile Palette

Expected Result:
Cell selection box should not appear in the Tilemap on editing the Tile Palette

Reproducible in:
2020.2.0b2 with Tilemap Package version 1.0.0

Working fine in
2020.2.0b1, 2020.1.4f1 with Tilemap Package version 1.0.0

Environment:
Occurring only on Windows 10