Some status pages lost their custom logo and favicon on October 1. During a storage cleanup I switched off an older storage location, and those images were still kept there.
They have been moved to the current storage, and every affected status page is showing its logo and favicon again. Nothing was lost, and uptime monitoring and incident history were not affected.
Thank you to @SpikeNit who reported it. If anything on your status page still looks wrong, open a ticket from Support.