Hot reload with disabled branding breaks JSF UI

Follow the JSF UI customization test scenario for Branding:

• On an empty studio project with no other brandings, create a new branding from the customization menu.
• Upload and select a logo (minion.png attached).
• Set a:
  • grey header
  • black footer
  • yellow links
• Go to Login Page tab and set a login background video:
  • URL: http://mirrors.standaloneinstaller.com/video-sample/video-sample.webm
  • MIME Type: video/webm
• Check Set as default branding.
• Perform a hot reload from the Nuxeo Dev Tools browser extension.
• Log into Nuxeo and observe configuration. (see config-deployed.png attached)
• Disable the custom branding with the toggle next to the Save button.
• Deploy.
• Perform a hot reload from the Nuxeo Dev Tools browser extension.
• Observe configuration. (see disabled-config-deployed.png attached)
  => The logo is still present and the page's CSS seems to be... messed up.

Unticking the "Set as default branding" option doesn't resolve the problem.