Another intentional flaw, designed to irritate device owners in the hopes they will buy a new phone.
This is what they do. Samsung, Google, Microsoft, etc. They send us these updates all the time. Google does it. Samsung does it. They all do it. All these little updates they issue out.... they are designed to bloat your phone and make it slower. I'm not just talking about major Android updates. Anytime you open your notification and you see "Gallery has updated" "Samsung Pay has updated" etc. etc....it's just making your phone more and more inefficient. Your phone is getting more and more inefficient over time and eventually you will buy a new phone because of it. That is their plan.
Then there are annoyances like this one. These companies have board meetings on these very things, I swear. They have done market research and testing to determine what flaws should be implemented to achieve the perfect balance between users not completely abandoning their favorite company and yet pushing them over the edge enough to buy a new device. That is what they do. That is why every time you update to the new android there are without fail "bugs". They are subtle. They are annoying. Can you blame them? It's all about the money.
And they're slick about it. See, it's not like the developers are aware of it. They're just doing their jobs as programmers. They are just trying to make your phone "better". But they have incentives to make these updates larger and larger and to include particular features. They get work orders from the boss, who in turn receives input from the bigwigs. Features like the double lock screen are work orders issued from higher ups who have done that market research as mentioned above.
Solution (and this is what I am doing): disable any and all automatic update features. Be it Google or Samsung or whoever. Disable all updates. Do it manually if need be. Your phone was perfect the first time it was turned on. It was designed to be efficient on day one. It didn't need any updates. I have learned my lesson and will never install another update. By day one hundred your phone is already on a path to inefficiency and you're already questioning upgrading to a new device.
I hate to sound like a conspiracy theorist here, but, well.....the system is rigged. Fact.