This has stumped me for a while, and I'm not exactly sure if it's related to the Aruba cluster, or if it's an issue with Netflix/Google/Apple/etc.
I got a company phone not to long ago, which was an iphone, I was previsouly and android person (still am) and all of the settings I normally enable for customers to use chromecast are enabled, and verified working, since my androids had no problem streaming. But for the life of me, I can't get my iPhone to stream anything, or even detect the chromecast. The google Home app, sees the chromecast, but it doesnt pop up in any apps to use it.
I am running 6.5.2.0 on a two AP cluster of IAP225's, All Airgroup services enabled, using a 2.4GHz only SSID for the chromecast, client match is off, DMO, MTO and broadcast filtering are disabled.