If an instance has the Workbox add-ons disabled in their account, backspace/delete no longer works in the Confluence Editor.

As a workaround, please ensure that the Workbox Host Plugin (com.atlassian.mywork.mywork-confluence-host-plugin) is enabled and that /plugins/servlet/myworkserviceselector.action is set to displays in-app notifications (the default).

To OnDemand customers, please open a support case to have Atlassian support enable these add-ons for you.