I use lovelace and mainly Glance cards which show everything in a room. For my kitchen I have three lights controlled by Fibaro Z Wave switch modules.
As I cannot use a light group with the switch modules I created a normal group which toggles off and on the three Fibaro switches that control my lights.
When this group is on and shown as on in the glace card the icon does not turn yellow unlike everything else I have seen.
Is this is a bug or do I need to configure something differently?
I’m not sure, it could be a bug. You should look at the state of the group in HA’s states page. If it doesn’t say ‘on’, then that would be the problem.
If you want to make a light group with switches, you can use template switch. It’s a little harder to setup but it will treat the switches as a group of switches.
There are a number of reasons to wrap a groups on/off functionality to a switch. They are all nitpick reasons though. Don’t bother with it unless you are very particular. I personally like to have all my lights and groups as switch entity_id’s. Also, as stated above, the icon for a group does not change (unless this was fixed in recent versions). So if you want an icon that reflects the on/off state or want an icon that changes, wrap it in a switch. I also originally set this up with emulated hue in mind. At the time, I don’t believe emulated hue handled groups.