We're aware of some device specific UPnP/Chromecasting issues, but the reason they've persisted is because they're device-specific. i.e. our current focus is on fixing issues that span all devices.

-Rusty

Maybe it's better to collect all those problems under an own part of the MMA android forum for more clarity (like in MMW4) ?

Because the existing problems seem to persist for a longer time and it's quite time affording to search around if there's anything helpful in here.