Settings in Groups are not persisted

Hi, 

I made a watch face where I offer color settings to the user. I grouped all color settings in one group.

When I change the color settings in the group on the connectiq app it works fine and I can save it. But when I open the settings again, all the settings in the group are reset to their default value.

It does not happen with ungrouped settings. Is this a bug or is there a pitfall I don't know?

Thank you so much! 

Bob