[2D][Tilemap] TileBase.StartUp not being called when a different Tile with the same instantiated GameObject is set

Repro steps:
1. Open attached project, open SampleScene
2. Open tile palette window, select Circle Tile 2 and paint on Tilemap in scene, observe "Ran StartUp" output in console
3. Select Cross Tile 1 and attempt to paint over Circle Tile 2 in scene, observe tile is not overridden and "Ran StartUp" output does not appear in console

Expected result: TileBase.StartUp is called when a different Tile with the same instantiated GameObject is set over a current one
Actual result: TileBase.StartUp is not called when a different Tile with the same instantiated GameObject is set over a current one