This happened to me three times already and it’s become an annoyance whenever I decide to travel and explore the world with my horse I will come across the river and I will try to make a jump for it and sometimes when my horse land in the water my horse just disappears randomly I would have to leave the game and join back to see my horse again

The first time that it happened to me I thought my horse died or despawned and when I went to that same trail one day I saw the same horse floating in the river where it vanished this also happens with donkeys and mules