The Meetings Activity report only displays an Assignee column, but the filters allow searching by Host and Assignee separately. When a user filters by a rep who appears in the Assignee column, the report returns zero results, because that rep is actually the Host on those meetings, not the Assignee. The mismatch between what's shown (Assignee) and what's filterable (Host or Assignee) makes the report confusing to use.
Ask: Add a Host column to the table so it's clear which field each meeting is actually populated with, and ideally a tooltip explaining the difference between Host and Assignee (here and elsewhere in the app).