Buffering with cable stations

I’m running channels dvr with a Qnap tvs672n with HDHOMERUN

The over the air channels with HDHomeRun work great but the cable channels I added as a source is buffering all the time.

My network is fios gigabit with Orbi WiFi 6 mesh network

My client devices are Apple TV 4 k

Are the cable stations you mention via TVE or a HDHR Prime? Do you see any errors in the DVR logs?

What is TVE

They cable station are through TVE

Ok. To troubleshoot further access the DVR server web UI and look in the log for the time period you have the issue. If any errors are displayed, share them here and we may be able to help.