Adding highlighted field to events table removes all previously-added columns

[delfuego]

When I configure my events table, using the Panel tab, if I add a new field to the Highlighted Fields, all fields are removed from the Columns list.

In other words: if my events table is configured to show me timestamp, message, and source (they're listed under the Columns section), and I then try to add logLevel as a Highlighted Field, timestamp, message, and source are all removed from the Columns list.