Unable to filter listItems by value in fields.

[Miles-Berry]

Describe the bug
Previously (as recent as last week) I was able to filter listItems by custom-values in 'fields' however now my same filter query that worked over a week ago no longer is functional and returns a 200 with no hits. I have verified the items I am filtering for do exist, the field names are correct, and querying with out the filter does still return results.

To Reproduce
Steps to reproduce the behavior:

1. GET https://graph.microsoft.com/v1.0/sites/{site-id}/lists/{list-id}/items?$expand=fields&$filter=fields/someField eq 'foo'

Expected behavior

1. Returns list of results that match the filter.

Desktop (please complete the following information):

• OS: Windows 11
• Browser: Chrome
• Version: 135.0.7049.41 (Official Build) (64-bit)

Additional context
filters based on anything outside of fields still seems to work, just when you filter on a field in fields does nothing return.

[ElinorW]

hi @Miles-Berry,
when you list items does the 'fields' property still appear or has this changed as well?

[Miles-Berry]

yes, the 'fields' property still appears on returned items. I just don't get any returned items when I filter on any of the attributes within 'fields'