[5.x]: Nested entries being duplicated

What happened?

Description

Our authors have been noticing nested entries being duplicated on pages. Unfortunately, I don't know what the steps are that reproduce the issue, but my only hunch is that it's related to drafts being applied. I'm going to do some testing myself to see if I can reproduce it, but I wanted to note this now in case anyone else has experienced this.

We have generic pages that use a page-builder like experience with a matrix field, and it's the nested entries within there that are being duplicated.

Steps to reproduce

1. NA

Craft CMS version

5.10.3

PHP version

8.2.26

Operating system and version

Linux 6.1.170

Database type and version

MySQL 8.0.44

Image driver and version

Imagick 3.7.0 (ImageMagick 7.1.1-32)

Installed plugins and versions

Alt Text Generator | 5.2.1
Amazon S3 | 2.3.0
Asset Usage | 4.2.1
CKEditor | 5.6.1
Colour Swatches | 5.1.0
Empty Coalesce | 5.0.0
Hyper | 2.3.7
Image Hotspots | 3.0.1
Many to Many | 4.0.4
Neo | 5.5.9
Retour | 5.0.14
SEOmatic | 5.1.21
Template Selector | 5.0.1
Units | 5.0.1
Vite | 5.0.1

Start by creating a generic page with a matrix field containing nested entries in the reported Craft CMS 5.10.3 environment, then test whether applying drafts duplicates them. Compare behavior with and without the listed plugins and narrow the issue to a reproducible case; done means nested entries remain single and the reproduction is covered by a regression test.