The bug
The spawn chunks used to be 16x16 or 16x17 or 17x16 or 17x17 chunks.
Since the recent snapshots the size changed to 23x23 chunks.
• Visualisation of the spawn chunks on the top right:
[media]Note: Since 19w08a the spawn chunks are not actively loaded anymore.
How to reproduce
Download
and
Open the "Spawn Chunks Test" World in 1.13.2
Activate and/or deactivate the levers of the clocks of the command blocks
Lower your rendered distance to a minimum
Move away from command blocks and observe the evolution of messages in the chat (If the messages still appear despite being away from a hundred blocks, it is that the chunk is still active. Otherwise, it is not active.)
Repeat the experiment in 1.14+
Examples
Here is the experience in videos:
Related issues
is duplicated by
relates to
Attachments
Comments


I also request thee to make Spawn Chunks entity processing back again, Please.
Spawn chunks being lazy chunks is tracked in another ticket: MC-144610
According to MC-148038, spawn chunks are now 19x19. Can you confirm this?
@unknown Without having tested it, on the other report @unknown mentions that they tested it with the despawning of items and say that the previous spawn chunks where 12x12. So they are talking about entity processing chunks, while this report talks about all ticking chunks (which currently are still 2 chunks wider than entity processing chunks on all sides).
So both reports talk about the same numbers.
19 (entity processing chunks) + 2 (ticking chunks left) + 2 (ticking chunks right) = 23
Ah ok. I'll resolve it as a duplicate to this then. Thanks!

Confirmed for 1.14 Pre-Realease 1 and 1.14 Pre-Realease 2
Demonstration:
• What it is expected (1.13.2):
• The bug (1.14):
[media]Here are the maps for you to test yourself:
• Map 1.13.2:
• Map 1.14:
[media]
Still in 1.14 pre-3, 1.14 pre-4 and 1.14 pre-5

Still in 1.14 Release

Still in 1.14.1 Release

Still in 1.14.2 Pre-Release 1 and 1.14.2 Pre-Release 2

I have tested it on a 1.14.4 world, and it still having 19x19 entity processing chunks.

Yeah it's still 23x23 chunks in 1.14.4
1.14.4 has already been marked as affected.

This is not a bug.
This is a caracteristic of minecraft and how chunks work now.
https://minecraft.gamepedia.com/Spawn_chunk
There is how it works.

Why is this suddenly invalid? EDIT: ah, game rule to control the size, resolving this while not fixing it.
(also, Luis (I know it's been 4 years), but this report was about a change made to them, not their existence)