When we run the Investment Allocation job in Clarity, it updates "Last Updated By" and "Last Updated Date" for the corresponding investments.
This is working as designed.
As per current design, the (Last Updated By) and (Last Updated Date) fields will change when the Investment Allocation job is run.
The following articles explains in further detail the auditing design in Clarity.
Project Team Table Last Updated Date Appears Inaccurate
Allocation value audit changes due to default clarity job