Galaxy S6 Active problems after 5.1.1 update

Hello, hope someone can help me that has had this same problem with their Active phone or either test their phone by connecting to a device through the night while sleeping and see if the device is still connected in the morning.

I recently replaced my 3 year old Atrix HD phone that died with a Galaxy S6 Active.  My original Active phone indicated almost immediately an operating system update(5.1.1) was available.  After doing the update, I noticed the hotspot option on phone would not keep devices connected even though I had it set for "never time out".  After contacting over 4 ATT techs and 2 Samsung techs, and these techs being able to manipulate my phone as if they had it in hand, ATT ordered a replacement phone for me.  I received it 12/11/2015.  I tried to get it to update the 5.0.2 operating system as soon as I got it but it did not show an update was available until 12/20/2015(yesterday), so I had to send back my first phone in order to keep from paying for 2 new phones.  I did the update and now this phone which was working perfectly with the old system keeping devices connected 24 hours per day is doing the same thing.

I usually have my Directv receiver and printer connected 24 hours a day unless I leave home with my phone. My othe devices connected are my laptop and Vizio TV.  Usually, the phone hopspot will show no devices connected fairly quickly if I am not constantly using my

laptop.  The phone still shows the hotspot as on, but no devices connected.  I have to manually turn off the hotspot and then turn back on and all devices reconnect for awhile, then eventually the phone will show no devices connected again.

My Motorola Atrix HD worked flawlessly for over 3 years as a hotspot and never disconnected unless I turned the hopspot off.

Thanks for any help or information,

Terry(coolbikeman)