How about Samsung Pay then? I think that was the only other thing that was new for me.It's not the fingerprint security, I haven't used that at all and my S7 started having the same button issue within the first day.
Haven't used that either. All I had done was the google sign in, took a couple pics, install Twitter and maybe Facebook, I texted, YouTube did an update, and I swapped the SD from my old phone. It was within the first day that it happened, that was Sunday, it happened again yesterday. My son got an S7 at the same time, his is not having the problem. Rules out a Verizon issue I'd think.
GT - I'm a Sprint Product Ambassador and want to try and help. As this has been reported across carrier devices, I don't believe this is a Sprint issue vs a Samsung software issue so my ability to fix it will be limited. Did you try the suggested fix in the string and did that help? If there is something you need from Sprint in terms of help with this, please PM me and I will do my best to assist.