This has been mentioned every time with these phones, but water resistantance is not water proof.
This same thing happened with the S5, the S6 Active and now the S7 Active.
The rating is the same as the Note 7. I wouldn't use my Note 7 underwater. That is there for accidents and sometimes you may be fine, it isn't for an underwater camera.
Except they put a feature in the camera app, aqua mode, that is specifically for underwater camera shots. The info on the mode even states, "appropriate for taking underwater pictures".