I’m having intermittent issues. Some are like you described - where the mode doesn’t seem to change based on actions in hello home. I’ve noticed that if I double click the apple home button on my phone then click back on the app, it refreshes and shows that it actually changed modes. If you try that, I think you’ll find it works most of the time.
However, I’m more concerned with instances where my automatic actions aren’t taking place when they should or even at all. For instance, I have “Good Night” set up to automatically activate at 10pm. Sunday night I got a notification at 9:34pm (it actually had that time under the message) that Hello Home was performing “Good Night” as requested at 10pm… The same thing happened the next morning. I have “good morning” set at 6 am and I get the notification at 7:51am. Some nights it doesn’t perform the action at all. Sometimes it performs the action and the mode doesn’t really change (This seems to have been fixed over the last week). I had my alarm scare me to death last week, because the mode never changed even though the action was displayed in “Hello Home”.