We have this redirect problem on guest access networks but only for
apple devices (ipad, macbook pro so far). Android for example redirects OK.
The apple devices stay connected, just doesn't redirect. Backing out, starting a browser and entering a url works.
I have a "feeling" this might have something to do with the apple CNA - Captive Network Assistant.
Can be disabled in 9.7 I think.
Haven't tried it though since we are still on 9.5 and am waiting (with bated breath) for 9.8