In the last two iOS release, 11.4.0 and certainly 11.4.1 I have been getting errors relating to networking. Apps come up with messages and say that I am not connected to the internet, pinging say 8.8.8.8 comes up with no route or unreachable or some such, or DNS is inaccessible. I have unfortunately not noted at these times whether access to the local LAN is ok, which is stupid of me. Turning the wireless off and on again just fixes it. Has anyone else ha similar problems?
I have 300Mbps 802.11n WAP very close, about than 7m away, and it shows 300Mbps data rate but with very low signal strength - both as reported by the WAP. This is because there is a wooden wall and a wooden doorpost in the WAP of the AP which is on 5GHz. I am in bed, in the main bedroom. The upstairs WAP is just outside the bedroom and it is just off to one side of the doorway so it is not visible through the doorway, and is close to the edge of the door. There is also another WAP in earshot, close but on the ground floor and not quite immediately below.