The object(team) attributes, e.g.
are showing as changed by a resource, however the resource is not logged in or associated with any job that can update the Global Audit Trail.
If the resource did not directly update the allocation or % allocation fields, then there is the job (Update Earned Value and Cost Totals) that indirectly updates the Audit Trail.
Release : 15.7
Component : CA PPM SAAS APPLICATION
This is by design.
Administrators can opt to either pause the job(Update Earned Value and Cost Totals) or associate a different user with the job.