Been seeing it for a while on my deed, apart from a relatively high ratio of packed tiles lately, some tiles, both with and without animals have been reverting to normal grass. Thought it was "old enchants finally dying" as the deed is a bit old, but now a friend whose fields we JUST finished enchanting a few days ago, took maybe 2 weeks to do the whole thing, 2 tiles reverted to grass today. Bug or ninja patch?