Invincible mobs created with the old glitch disappear

A bit of clarification: Being able to do this at all isn’t the issue. The bug allowing for this to happen was patched roughly three years ago. The issue is that they now vanish for no reason, despite still having health

This is a bug because mobs that still have health shouldn’t be able to EVER disappear or despawn, unless at least one of these two conditions is met:

1. The mob is not persistent

2. The mob is a hostile mob, and Peaceful difficulty is turned on

This might seem like a long shot but this is so much more than a bug - I have a realm on bedrock and my bestfriend passed away a year ago, her doggie is the only thing I have from her and if he disappears that will feel like the biggest kick in the gut, please stop this from happening - Minecraft is so much more than just a game.

Please fix this, I have so many dogs and mobs in my museum that are invincible and it would set me back months behind if this wasn’t fixed

Can confirm it’s still an issue in 1.21.70.25. Please, PLEASE, PLEASE fix this, I beg.

I don't think simply erasing these mobs are a good solution to the game.We play the game not only for creating, but also a reminder to our time and memory.Since mojang already fix the bug so no new undying mobs can appear,why not just keep them or at least, fix the bug but give a new property to indicate these remaining mob?

Remember when you guys allowed us to keep big mobs in boats. They have not sentimental values at all but you guys made it so they could stay. Plz we are begging you. The mobs in this bug report mean way more than big mobs in boats. To a lot of people. The mobs are not dead they have health and can breed and hold armour. It’s no to late to do the right thing for the community

Can you atleats make a way for us to not make them immortal no more. We don’t want them for the immortal purpose we want them because they are out memories plz mojang don’t let us down.

I hope you implement a different solution instead of killing off all immortal mobs. Maybe if they are name tagged, they wont despawn when the new update drops but they will be normal again.

I worked so hard to get my immortal Warden, PLEASE don't destroy these mobs...

Although this will not affect me, I sincerely hope that the invincible mobs that people painstakingly made will not die. For many people, these mobs have an undisputably sentimental value that should not be ridden of and I believe that such immoral actions should not be taken. To some, these simple mobs could be the motivation for them to continue their playing of the same world or even the game! Imagine if you had a pet that has always been with you during your darkest times and it suddenly died to a random accident you couldn’t prevent. That’s what some of the people are experiencing right now, except, it is even worse. I want you to know that Minecraft isn’t simply a game for some people, and I want you to know that these mobs aren’t just lifeless creatures in the faces of the people that own them. Sure they might have used a bug to achieve it but isn’t that the beauty of the game? You might not like it but the only reason why some people are only playing Minecraft is all because of amazing people such as itsmejames that help introduce this side of Minecraft and help people keep their interest for the game, and right now, he is resorting to begging just for the mobs to continue living. I have no say in the coding that goes into the changes that have to be made to keep the mobs alive but surely it isn’t too difficult? Just remember this, these mobs hold a story to people’s Minecraft worlds, and these stories would be erased just like that. With that in mind, I sincerely hope that someone would take the initiative to make the change. Peace out. (TGD)

Thank you for your report!
However, this issue is Working as Intended.

The report you have submitted is working as intended:
https://feedback.minecraft.net/hc/articles/34725094103693

To better support the long-term health of the Minecraft engine, we've made the difficult decision to fix an old splash potion bug that was used by some players to make invincible "pet" mobs. In worlds at or above version 1.21.70.24, any remaining invincible mobs will now properly die and despawn.

Please note, that mechanics of the game may change between updates.
Things such as graphics, sounds, world creation, biomes, redstone, villagers, and animals may not work the same in current versions.

Full Version History – Snapshot Version History – Feature Requests and Suggestions

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📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
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Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki

Mojang, we don’t want to keep the mobs in their glitched, immortal state. We just want them to stay alive. They mean more to us than just mobs and there’s no need for them to die instantly, simply create a check that reverts a mobs “dead”:1b value to 0b if the mob still has health. That way everyone will be happy, we will keep our pets, you will optimise your game engine. Easy!