Long Delay When Changing Channel

I have DirectTV Stream and use the C71KW-400 box from ATT.

There is a 10-25 second delay when changing channels.  The problem is the same on 7 different TVs and boxes.

Internet speed via ethernet is 240 Mbps on TV

I have done the following:

- Checked System Update

- Performed Restart

- Performed Factory Reset

None of this works.  Can anyone help with a recomendation?