GraphQL GroupBy Fails on Custom Date Fields with Parsing and Filter Issues

When attempting a groupBy operation in GraphQL on custom date fields, the query fails due to the following identified

Parsing Error: The response fails to parse when attempting to process groupBy results.

Filter Issue: Using ne: null filters in the where clause does not function correctly for both custom and standard date fields.

1. In a Salesforce org, create a custom field of type Date on the Contact object using Object Manager (e.g., Service_Provider_Assigned_Date).
2. Execute a GraphQL query that includes a groupBy operation on this custom field.
3. Observe the query failure.
4. The issue occurs regardless of the inclusion of a where clause.

Currently no workaround for this

Don't groupby custom date fields.