Sync status overlay does not work on manually set custom folder icons

By default, the Dropbox folder in my home folder will show the green checkmark indicating that my dropbox is synced. However, if I change the meta-data on the folder Dropbox folder to use a custom folder design, i.e. with Numix, via:
gvfs-set-attribute /home/britt/Dropbox metadata::custom-icon-name folder-dropbox

a weird issue happens. While the folder does take the beautiful new icon, the checkmark is not gone for the Dropbox folder, though it remains for all child folders inside.