R6220 issues NAT type

I have the R6220 and have had numerous issues with it for the last few days.

First, my 2.4GHz started dropping out like crazy while the 5GHz works fine.  

I was running V1.1.0.86_1.0.1 firmware and ended up backgrading to 1.0.68....i believe and found that slightly more stable but not really.  

Then I tried to play Xbox one x and was able to play but not to join a party.  it says to change network settings and the Xbox tells me NAT type unavailable.  Testing it tells me it can't obtain a Teredo IP.   I have done dozens of resets, power cycles, I re-upgraded to V1.1.0.86_1.0.1.

I have disabled UPnP and reenabled.  I have tried port forwarding. I have tried activating ipv6 on the router, using auto config and auto detect.  I dont know a lot about any of these things but I have been following directions on various support sites.  

nothing has helped so far.

 

Any help would be greatly appreciated. If i need to provide more details please let me know.

 

Thanks