OK, I had something like this happen but, that was after I upgraded my phone and my camera was offline and I couldn't change the setting with the swipe up from the main Hub Max screen. The camera worked without any extra hoops for me on the initial setup.
Not sure if this is what's going on with you, but I checked settings in the Nest app under The Main screen, and Home/Away assist. Also on the main screen, I made sure my Nest Hub Max was showing and I clicked that too and made sure all the actions I wanted were set correctly. I also checked under "What decides if I'm home," the option is under Home and Away Assist, and made sure the Nest Hub Max settings were correct.
That's my best guess since I can't see what you have or know what all is involved in your setup. Since I don't use cameras or anything else other than the one on the Max I'm not sure what settings are added or replaced when other peripherals are involved.
As mentioned earlier, if none of those suggestions work you might want to post in the Nest camera. You should probably err on the side of too much info. We can't see what you're doing and that extra detail will help those experts guide you.
