Entities despawning in Minecraft 1.14

I’m playing Minecraft 1.14 on my PC and I have a few problems with it.

Recently I’ve come back from mining trips to find that a lot of my animals and minecarts are despawning, I sent a minecart with a chest back to my house and went back to find the cart despawned.

I’ve lost 2 horses which were nametagged and tied to fences with leads and over 60% of my sheep have despawned, they are all within the boundaries so they don’t despawn.

I’ve heard Mojang is working on 1.14.1 update but still, this is super annoying. If anyone is still waiting to update to 1.14… don’t do it. At least not yet.