We have a corporate identity design on Connections and modify the IBM Connections user experience by injecting resources in the pages that are returned to users using the Customizer.
The issue could be reproduced on Blogs pages, specifically when a user try to
1) create a standalone blog without a title
2) create a blog entry within (community or standalone blog) without a title
The Customizer styling disappears and only vanilla Connections UI styling is visible on the resulting error page. We are expecting that the Blog creation will fail with a warning that a title is required but the styling will remain.