I got my parents using Channels DVR too a while back. They are running the server on a DS218 NAS and then clients on Apple TV 4th and iPads and iPhones. Since upgrading to v4 channels (though they're not 100% sure the issue started at exactly that point) they've got a weird bug where if they click on a program airing in the future on the guide (so they can set it to record), the screen flickers but nothing else happens. All other functions are working fine including clicking on a program on now from the guide to tune to it, and setting a program to record from e.g. the search interface. They're having the same problem on all their client devices so I'm assuming it's an issue with the server. Restarting the NAS has had no effect.
Anyone else had this issue or any ideas what else they could try?
Thanks!