Named creakings still despawn on world reload

Hi!
Could you please upload a video of this issue and let us know if you're using any add-ons or resource packs in your world?
Could you also please write repro steps in this manner?

Steps to Reproduce:
1.
2.
3.
Observed Results:
(Briefly describe what happens)
Expected Results:
(Briefly describe what should happen)

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Sorry I don’t have a video available yet, but here is the info:

Using only an RTX texture pack, no behavior packs or other packs.

Steps to Reproduce (I did this during the daytime):

1. Place Creaking Heart between two Pale Oak Logs to spawn a Creaking.

2. Apply a custom Name Tag to the Creaking (e.g., “The Creakster”).

3. Observe the Creaking has been named.

4. Contain the Creaking in a 2x2x4 glass box to make sure it can’t leave.

5. Save and quit the world with the creaking in plain sight right in front of you.

6. Reload the world.

Observed Results:
Player loads facing where Creaking was, but Creaking is gone, apparently despawned and nowhere to be seen.
Expected Results:
Player loads with the Creaking still present in the glass box as before quitting the world.