Nuendo 11 - Group Visibility Broken?

I no longer appear to be able to show hide group tracks individually. This has always worked fine in the past, but recently when in the visibility panel, if i click any group channel, all groups are shown or hidden?

The audio, midi tracks etc work as expected, but not the Group tracks, I have hunted for a setting to change this but i cannot find anything.

5am

there is no setting
group tracks are shown/hidden all together or individual as all other track types
just works on my systems

Thanks for your reply, i could not find a setting, now I know why!

Following further investigation it only appears to be happening when a Project created in Cubase 11 is opened in Nuendo 11 (i use Cubase for production and Nuendo for mastering).

5am