Since updating to 2.72 the toggle in activity group, turns on all activities in that group. So I have watch Apple TV and Watch Shield TV both on at the same time. Switching between activities does not change the source in the AVR.
If turn on one activity in the group and then switch to other activity in the group they both stay on and the source in AVR does not change.
Am I doing something wrong or did something changed?
Are you referring to the toggle button next to “Cinema” in your screenshot? If yes, as @HarmonyFan mentioned above, that is not an activity group. This is just an option to group multiple entities together in the UI.
I wouldn’t name the activities the same as the devices because it makes it difficult to distinguish. At least give the activity an easy to remember icon.
I have a shortcut of the room at start of the activity name so that I can use the filter.