I have a 800+ streak, so my icon used to always be orange. It didn’t even change when it “got sick” for everyone last year. Now they seem to have removed that feature and it “gets angry” if it’s past 22.00 and I haven’t done an exercise yet. Which is what I very often do.
Disable automatic updates in the play store. I have them dissbled for all my apps to have better control over what is pushed upon me. I noticed that also stops the Duo icon to change when I was slacking off.