If you are on a base table like task and there is a filter to change_request for a reference field on change_request like (requested_by is not empty), and you do a column search, The reference type of the filter disappears.
Steps to Reproduce
1. Go to any instance.
2. Go to task.list
3. Create the following filter.
a.Active is true
b. Change Request.Requested for is not empty
5. Now do a column search on any column like 'Number' or ' Short Description'
6. See that the filter from 3b has disappeared.
This problem has been fixed. If you are able to upgrade, review the Fixed In or Intended Fix Version fields to determine whether any versions have a planned or permanent fix.
Related Problem: PRB1330887