Suddenly, phone opens with wrong fingerprint![Problem Solved]

While certainly an interesting, and possibly useful function, it highlights the issue that many people have with cell phone setup in general, that there are too many settings, some that conflict with others, that cause problems such as this. If I'm not mistaken Samsung is one of the top brands with many complaints resulting from too many options, some of which are difficult to even comprehend! The fact that it took so many people to figure this out proves the point. Since the FP reader is built in to the power button anyway, thus your FP will automatically be read, why even have such an option, unless you have double tap to wake turned on. Not sure if double tap is available with the default launcher but I always use Nova and it is a feature. Almost all phones have numerous settings that can easily be missed because of the way they are categorized, or buried under other sub-settings making them difficult to find or understand what they do. I'm about to take ownership of my 2nd ever Samsung phone in a day or so, thus my concerns and observations. Yes, I am getting a brand new S10e. We'll see how it goes.
 
You make a good point. The Automatically Lock setting has been around forever, and is still useful for people who don't use the fingerprint sensor (or, perhaps, for people who want to let others use their phone more easily, like family members). I think it's just a byproduct of devices getting more and more advanced as time goes on -- if a person wants something simpler, then maybe a featurephone is a better choice (but those probably also have more settings these days than 20 years ago!).
 
While certainly an interesting, and possibly useful function, it highlights the issue that many people have with cell phone setup in general, that there are too many settings, some that conflict with others, that cause problems such as this. If I'm not mistaken Samsung is one of the top brands with many complaints resulting from too many options, some of which are difficult to even comprehend! The fact that it took so many people to figure this out proves the point. Since the FP reader is built in to the power button anyway, thus your FP will automatically be read, why even have such an option, unless you have double tap to wake turned on. Not sure if double tap is available with the default launcher but I always use Nova and it is a feature. Almost all phones have numerous settings that can easily be missed because of the way they are categorized, or buried under other sub-settings making them difficult to find or understand what they do. I'm about to take ownership of my 2nd ever Samsung phone in a day or so, thus my concerns and observations. Yes, I am getting a brand new S10e. We'll see how it goes.
Yeah true, but that's good and bad, we can do lot more customization, but we can forget those settings when something happens which will take more time troubleshooting if something like that happens. But for most part if your familiar with that brand for awhile you seem to know the ins and outs of settings.