Vaadin 7.4.3 (Valo Theme) - Tabsheet Flickering

Good Morning,

In my application I’ve a simple tabsheet with 2 tabs, both with icon.

When I switch from one tab to another, both tabs flicker. It seems like that the icon gets removed and re-added everytime you switch from tab to tab.

This beaviour can be reproduced also in the sampler application at this address
enabling "
Tab7 icon
", though this cannot be reproduced with the valo theme demo at!tabs
. The only difference I can see is that the valo theme demo uses FontIcons instead of simple icons.

Any Idea on this?

Unfortunately I cannot use FontIcons.

I can confirm that using FontAwesome as tab icon, the tabsheet component does not flicker