iOS [HELP] Tile bug at the bottom of my farm?

[Shee]

Hi there, can anyone help with this? : ( I've been trying to plant fruit trees around my farm, and I also used the CJB Item Spawner, then after a few days this appeared at the bottom of my farm. If you look closely you can see a dirt tile overlapping with the border grass tile. I've since then uninstalled the CJB item spawner but this tile is still messed up.

Is there any way to fix this? : (

 

[Odin]

What platform are you playing on? You've selected iOS, but then mention using mods, which are not available on that platform. Are you on a Mac?