iPhone 6 WiFi problem when using TP-Link TL-WA830RE access point

I have a problem with the WiFi connection for my new iPhone 6 with IOS 8.1.1. When I connect to the access point, TP-Link TL-WA830RE, the connection fails every few minutes.

However when I connect to the providers router, there is no problem at all.

Other devices in my home work perfect with the TP-Link access point??? My Ipad, my wives iPhone and iPad etc...

For now the workaround is OK for me but I am curious if other people have experienced the same problem.