Description of the problem
"Limit by Category" setting on relationship fields does not appear to be working as expected.

How To Reproduce
Steps to reproduce the behavior:

1. Create a relationship field, select a channel and then, under "Limit by Category", select a category to limit the selection of related entries.
2. In the related channel, set the categories on the entries as required.
3. In the parent channel, "No entries found" is displayed in the relationship, although entries exist and are assigned to the category specified in the "Limit by Category" step, above
4. Back in the relationship field settings, reset the "Limit by category" to "Any Categories" and the entries are available for selection.

Error Messages
No error messages

Screenshots / Videos / Template Code

Entries in the related channel have the category selected.

NB: The relationship field is called "Images", below is what is displayed if limited to a category

Environment Details:

• Version: 7.5.19
• PHP Version 8.4.15
• MySQL Version 8.2
• OS: Windows
• Web Server: Apache

Additional context
Examining the database, the serialized field settings for the relationship field appear to limit the categories to category id 0. On another occasion categories ids that did not exist were specified in the serialized settings.