Bug/Issue Tiles on the farm not being affected by the hoe.

As seen above, there seems to be issues with certain tiles on the farm being unaffected/immune to the hoe even though there isn't any reason why it shouldn't.

I have tried to use my axe/pickaxe on the tiles to see if it would fix it, but nothing happens. If I put a sprinkler on that bugged tile, I would not be able to remove it with the hoe either (axe and pickaxe still works).

 

In my farm this happened because of a fruit tree I attempted to remove, I had to save-edit to fix it (ie: I deleted tree).