This is a known issue that is being investigated and worked on. It should be fixed in an upcoming release.
Our apologies for any inconvenience!
Until the issue is fixed, your new view is unpublished but still part of your workbook document. One workaround is to access the workbook from Tableau Desktop, and re-publish with the new sheet selected to be visible. I hope that's a suitable enough workaround until the fix reaches you! Thanks for using the product thoroughly!