When there are multiple previewers on the page, the content of the geospatial previewer can show on a different preview tab. This could be related to the ajax call in the geospatial previewer returning when Configuration.tab has already changed.

Offending previewer: https://opensource.ncsa.illinois.edu/bitbucket/projects/CATS/repos/clowder/browse/public/javascripts/previewers/geospatial/geospatial.js

Example of correct pattern: https://opensource.ncsa.illinois.edu/bitbucket/projects/CATS/repos/clowder/browse/public/javascripts/previewers/zipfile/zipfile.js#2,22,24,31-32