I have 3 AppleTV's in my house. Two of them are the 3rd generation units. I also experience this same problem. I go to watch a show via home sharing and it doesn't find the computer. Restarting the AppleTV fixes it. Then it works for about 24-36 hours before needing restarted again.
I have tried doing a full restore of the units from the computer. I have moved them to wired connections and also moved them off of DHCP. I've tried telling them not to sleep. I've tried making sure silly things that shouldn't affect it are set and nothing seems to alleviate this issue.
I have many years of experience as a Systems Administrator and Programmer so it isn't a lack of competence on my part to get this right.
This is EXTREMELY frustrating. I also attribute it to iTunes 12 / Newer AppleTV iOS software bugs.
I have tried doing a full restore of the units from the computer. I have moved them to wired connections and also moved them off of DHCP. I've tried telling them not to sleep. I've tried making sure silly things that shouldn't affect it are set and nothing seems to alleviate this issue.
I have many years of experience as a Systems Administrator and Programmer so it isn't a lack of competence on my part to get this right.
This is EXTREMELY frustrating. I also attribute it to iTunes 12 / Newer AppleTV iOS software bugs.