You have a multi valued lookup attribute on the Investment object. In the Modern UX (MUX), you go to the Task workspace and use the MVL attribute as a filter. Even though there are records having the value you are using to filter no rows are returned.
Steps to Reproduce
In Classic view
In MUX
Expected Results- The tasks with DBA on the new attribute field return
Actual Results- No rows are returned
Release : 16.1.0, 16.1.0 patch 1
This no longer occurs in versions 16.1.1+