Bug. Clovers/grass grown in the house

[Asnowea]

Hello, we never had this problem until today, since the game was released. Ok... I host the game and see everything fine, but my friend (only him, not me), when he enters my game, he sees all the clovers and grass grown in the house, (this one has a clay floor), which we cut a long time ago, so, we returned to save point that worked, but again when advancing, saving and re-entering, the same thing happened. It gives him a lot of lag and cannot cut them either, he has already deleted game data, reinstalled and the problem continues. Hasn't it happened to anyone?