My phone started this about 2 weeks ago. Restarting everyday. I've deleted apps I no longer use but still galena. Checked all settings that would cause this & made sure there all off. My daughter has the same extract model phone and hers did a random restart on its own greatest m yesterday.
Solved! Go to Solution.
I ended up fixing it. I went to Settings>Advanced Features>Bixby Routines>Off. I never turned them on, so either the most recent update turned them on, or it has been on this whole time, and I only started noticing because the recent update enabled a different Bixby setting.