We have a discussion about WiFi.
And it can work fine with other devices yet not work with Samsung things. Part of this has to do with distance. You don't get the same distances as your laptops so that's a start. The sad part of this story is that as long as folk maintain that if other things work, then the network is fine we can't make any progress.
That discussion is over in the CNET Networking forum.
Another item is the firmware version. When you have time, post the full model number and what firmware.
Finally I read today on the Samsung site about server maintenance. This means all sorts of weird things can happen.