TopIcons doesn't work with X.Org session [artful]

[Sascha Manns]

Hello list,

i have seen a interesting thing on artful.

If i'm using the Ubuntu Session with Wayland, the Apps (like Shutter,
Nixnote, Tomboy ...) are visible in the TopIcons place on the right
side.

If i'm using the Ubuntu Session with XOrg, that Apps aren't visible.

Is there a different handling of such icons between Wayland and XOrg?

Greetings
Sascha