Bug Report – User Dropdown Filter Showing Duplicate Values in Looker Studio Pro

Description of the Issue:
Please refer to the attached screenshot for better clarification. In the Looker report, the displayed username in the list does not match the name shown when hovering over a single user. The hover state displays a different name than the one listed.

We have verified in the backend that there are no duplicate records for this field, and the exact same configuration works perfectly without this issue in the Looker Studio Free version. We have also confirmed that all filters, transformations, and data schema settings are identical between the Pro and Free setups, with no mismatched joins or blending issues. Requesting your assistance to investigate why this discrepancy occurs only in Pro, as it is creating confusion for end-users and affecting dashboard usability.