Minecraft disappearing horse bug

Hi there was this Minecraft issue that happened today, which I will mention as a 'bug'#

 

So today I went to find some slimes in the pond with my horse, and then I got off the boat and climbed onto my horse while both of us floating in the pond but as soon as I did that I went to discord and came back to Minecraft which crashed. So I close the game and restart it and go back to my world. When I do that I see that I am in the exact place but my horse was not there. (I was on my horse before the game crashed.)

So I look for it in the area and it's not there anymore. So my horse randomly disappeared