animals on leads and in fences and tamed horses despawn

i’m on the xbox 1, but it’s a realm. people are playing from mobile, pc, and others. it’s bedrock. in all my world i’ve made big farms. but in realms i’ve made small ones. recently animals have started despawning. i had my horses in a small pen, and on leads, nametaged, and had a saddle on them, and they despawned, leaving only the lead on the fence. i clicked it and it just disappeared. nametaged mobs just despawn no matter how small the pen is. we have had this issue for a while. people’s best villagers despawn when they walk away. it’s gotten to the point where i’m scared to tame animals because of this. at first we thought it was a griefer. but the mods stayed on a few days and nothing. they even kicked people who never play or talk in the discord. nametag, saddle, lead, 2 by 2 fence, all of it together and they still despawn. even nametaged villagers in a small hole with a bed and block to be attached to despawn. please look into it. i had a pure black speedy and high jumping horse despawn with a saddle, nametag, lead, and 2 by 2 fence around it, just despawn.