[Build: 1.1.0 (1098027)] Replacing a rural tile with a urban tile removes border growth while building is under construction [reproducible]

[HalalHamburger]

Summary: When you replace a rural tile with a urban tile the game (secretly) removes the border growth generated by that tile. The border growth for that tile is unavailable for improving until you have finished a building in the urban tile.

Problem:
When replacing an rural tile with an urban tile the tiles below the urban tile are not available for improvement. The tiles that are able to be improved have a green hue the others can't be clicked. Picture1
Only when the building has finished are the tiles available to be worked again Picture2
When a normal rural tile is improved next to this tile so the border growth of the tiles "overlap" it causes a previously unworkable tile to be workable again Picture3

Suspected issue:
When placing a building on a non-improved/non-rural tile the city borders do not grow until a building is finished in the urban tile. What might be happening here is that this rule is in place even though the borders are already grown from the rural tile. There is no change to the borders visually but during construction of the first building in an urban tile the border growth of the tile is reset to that of a non improved tile until a building is finished.

 

[StargazingDog]

This is as intended. You cannot build anything off of an unfinished urban tile. It’s been this way since day one. Without this, you could “cheat” and reach a resource further out, then cancel the building.

Once you convert a tile to urban, you must complete a building on it before you can extend any tiles out from that tile.

 

[Krikkit1]

Side effect of getting to move the rural population to a new tile before the building finishes.

 

[MutilationWave]

You can still use this to get farther out, just work two rural tiles in a line, start a building on the closer one, and you can move that rural worker to any tile adjacent to the farther worked tile. You can switch production or even never complete the building.