Drupal 8 has a Views setting for block displays that allows you to hide them when there are no results, empty text or headers/footers. I thought Backdrop had a similar option (or maybe that was D7) but I couldn't find it...

screenshot_2018-12-07 staff members content socialists and democrats Drupal 8's empty block setting

Recommend adding this to Backdrop (if not already) and putting it under 'Block settings' section (for some reason Drupal has it at the bottom of the 'Other' section).

GitHub Issue #: 
3411