Verified in 5.10.4.1.20190430152139_40a1d86
Steps of verification:
1. Copy report Events -> Policy -> Policy Event for last & Days
2. Go to Custom and edit copied report -> Filter
3. Edit expression: select any field and after that select back original field "Policy Event.Miq Policy Sets : Date Created:" (also checked "Policy Event.Miq Actions : Date created")
4. Verified that all options are available, not CONTAINS
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2019:1247