[5.x]: Matrix propagation sometimes wrong for new entry

[WHITE-developer]

What happened?

Description

In our large multi-site multi-site-group setup it seems that some sites are getting the matrix blocks propagated while they shouldn't (as of Craft 5, Craft 4 propagated always on first save?).
The matrix is set to "Save entries to other sites in the same site group" but somehow sites from another group also get the blocks propagated, sometimes even only one site from another site group.

Steps to reproduce

1. Have a multi-site multi-site-group setup (in our case there are 58)
2. Have a matrix set to "Save entries to other sites in the same site group"
3. Create an entry with a matrix block in it
4. Save it

Expected behavior

All sites should have the "first time save" matrix content.
But at least only sites in the same site group have the matrix field.

Actual behavior

Some random sites from other groups also have the matrix field propagated.

(Same project as with the validation visibility, so should be reproducible with the DB sent last time)

Craft CMS version

5.2.5

PHP version

8.3.7

Operating system and version

No response

Database type and version

MySQL 8.0.37

Image driver and version

No response

Installed plugins and versions

No response

[i-just]

Hi, thanks for getting in touch! Can you please provide more info on how to replicate? The matrix field is set to the “Save entries to other sites in the same site group” propagation method. What’s the propagation method of the section to which it is added? I found the database export you sent over before. Can you please point to which entry and field are exhibiting this problem?

[WHITE-developer]

Hi @i-just
I did answer Brandon in that email conversation on this last Wednesday 09:51 CEST.
I discovered it in the news section. Section is set to "Save entries to all sites enabled for this section".
Happens with the "contentBlocks" matrix. It propagated to for example "Turkey" and "Slovakia", while those are other groups then when you start in "International". "Czech Republic" is in the same group as "Slovakia", but that one didn't get propagated.

[brandonkelly]

Was able to reproduce on your site, and got to the bottom of it. It’s actually easily reproducible in Craft 4 as well, so fixed it for the next v4 and v5 releases.

[brandonkelly]

Craft 4.10.6 and 5.2.7 are out now with that fix. Thanks for reporting!