This problem is related to poor wifi signal. When smart product can't detect it's wifi network, it goes offline. It should go back online by itself. Normally you shouldn't have to reset them. You might need to consider expanders and boosters.
Note: Having multiple hotspots doesn't make the signal stronger. Smart products might be too far from original router. Either too far or too many obstacles blocking the signal such as walls and floors. As an example, having the router in the garage or in the basement and having the fixtures on the 2nd or 3rd floor.