Hello! I work for a school district in IT, for which I use my personal phone for work. I have Plex at home (plex pass member) and have the plex app on my android phone.
We use software called AirServer, which acts as an Air Play device for iOS. They recently updated to include Chromecast. Since then any teacher on the network (since my phone is on the wireless) that has “on screen password” set (so when a device connects the software generates a password to enter on the device to allow connection) will get that screen randomly popping up. We tracked the IP down to my phone (galaxy s7 edge).
I believe I have tracked down the app that is causing it to your app. When I launch the Plex app it prompts every time. When i hit the cast button in the upper right and refresh the network it prompts every time.
Wondering if you have any insight into this issue. It happens quite a bit on the teacher’s laptop, as you can image it’s quite annoying for them. Screenshot is attached showing the popup. It’s the air server software, but that software is ONLY a receiver, it does not do anything except broadcast it’s there for Chromecast or Air Play devices.