Description

Similar to #17470, in some cases, the lazy eager loading for the nested matrix cards was only finding elements owned by the first nested entry. I tried a few other solutions, but those that made it work as expected resulted in the same number of queries as with eagerly() removed.

Steps to reproduce:

1. clean 5.8.13.2 installation
2. create a matrix field in cards mode (matrixCards), all default settings; with an entry type that can contain just the default title field (forMatrixCards)
3. create a matrix field in blocks mode (matrixBlocks), all default settings; with an entry type that contains the default title field and the matrixCards field; the matrixCards field needs to be mandatory
4. create a section (blog) with an entry type (article) that contains the default title field and the matrixBlocks field
5. create an entry in the blog section; fill out the title, add 2 blocks to the matrixBlocks field, fill out the title for both blocks and add at least one matrixCards nested entry to each; fully save
6. edit the blog entry from the previous step; remove the title from the first matrixBlock block, wait for autosave to complete and then try to fully save; when the page reloads the second matrixBlocks block will be empty; if you reload the page, the nested entries for that second block are back

Related issues

n/a - reported by @olivierbon