Reached out to support and they were able to resolve the issue. Here is the solution in case anyone runs into this:

DST end time needed to be set to December (time tracking bug of some sort that will be fixed in future firmware)
dst.png

Just set up an RLN8-410 NVR with 5 cameras. Everything works great except playback over any of the network clients (PC/Mac/Android) fails. Recording does take place and playback over direct HDMI connection to NVR works just fine.

Running latest NVR/Camera firmware and client software as of 7/25/2018.

PC Client: dragging a channel into a playback window and hitting play produces no result, fast forwarding has no effect although time slices are visible.

Android: Attempting playback runs the spinner animation for split second followed by "Playback failed" message.

Same behavior over LAN or Remote.

Anyone else run into this by chance?