At least for me, other devices connected to the same wifi network have no internet access problems. Given that I have a hard time thinking this is a problem with the access point or the router.
I have an issue with wifi 5Ghz, after some minutes the device disconnects and i can't find any wifi networks. The only solution is to reboot. If i change on router from 80mhz to 20mhz it won't happen this but the device won't connect automattically after a reboot.
So far I have issues with the 5 GHz band only. It looses connection suddenly and the list of networks in range is very short then. What is strange, is that the 1520 on build 10586, which always worked on 5 GHz, also looses the connection at the same time, while the Surface Pro 3 is still connected. Maybe this is due to the MIMO capabilities of my Asus AC-87U?
So far I have issues with the 5 GHz band only. It looses connection suddenly and the list of networks in range is very short then. What is strange, is that the 1520 on build 10586, which always worked on 5 GHz, also looses the connection at the same time, while the Surface Pro 3 is still connected. Maybe this is due to the MIMO capabilities of my Asus AC-87U?
So far I am having no issues using an Asus RT-AC68U running the latest firmware (3.0.0.4.378_9313). I've had an SP1, SP2, and SP3 and IMHO the Marvell WiFI/BT adapters they use are hideous and don't play well in the sandbox with others. You might want to try moving your SP3 to 2.4GHz. The Marvell adapters - again IMHO from personal experience - can't walk and chew gum at the same time so you might try turning off it's BT. I think you'll be amazed at much better is does. My setup is perhaps different from most in that I own no G or B devices nor does anybody that might use my network. Thus I have 2.4GHz set up as 40MHz N only and 5GHz set up as N/AC mixed with 20/40/80MHz. Having not to support B is a wonderful thing, at least for my RT-AC68U
I am having Wifi issues as well, the 950XL completely kills off my network and I would have to restart my router in order to get my WiFi back. I'm using a TP-Link C7 Archer.
I have this same phone and router and am seeing the exact same issue. I have had to reboot my router a dozen times since Friday.