Yesterday I had a try to put the DHCP ipv4 lease time to the maximum adjust. The media server still being detected on my lan after 11 hours. I will continue more tests. If this really work, could be...

@Kevin_Z I am curious to know what happen with this firmware router that after 3 to 4 hours working fine (or no working, in the case of ipv6), after everything change. Seems to be very coincidence. I...

I suggest you check this app and verify what change with the connectivity. If you can ping the router and another tests. https://play.google.com/store/apps/details?id=com.ddm.iptools Check if the...

@Nomads . On my router occurs too, but after some minutes it update the ddns server. I never measured the time.

https://community.tp-link.com/en/home/forum/topic/110214?page=7 This thread has details.

Link thread on this link. The beta firmware, other people said the Chromecast now are stable. But my smarttv and media servers have the issue. After 3 to 5 hours working, they stop to be detected on...