AirPlay not working on certain websites
Hello,
I've been using AirPlay for a while, mirroring programs from my iPhone X to my 50" Smart TV. One site shows the icon to press on it (see below) and is working fine, but its sister site, when clicking that icon, it reverts back to the AirPlay screen on the TV, while on my iPhone, at the bottom of the screen playing the program, that (blue) icon keeps blinking slowly. It stubbornly refuses to mirror the program on my tv.
I was trying to contact the site's tech support but can't get them to respond.
Any ideas here? Thanks!
Also, BTW, what's the difference between the 2 AirPlay icons the one below and the one with the 3 circles above the triangle?