You have not given us much information.
Assume this is live TV you are having issues with.
Does sound like your puck may be suffering some local network issues at times or may be suffering some kind of interference.
To help you further, can you run a network speed test on your puck.
Launch Netflix on your pucks (you do not need to be logged into it, if you do not use netflix) and scroll down the left menu to Get help.
Choose Check Network.
Would suggest running several times, over say a half hour period during tests or at your perceived busiest household internet usage time.
What is your speed on the puck?
Also, can you make sure your puck is not suffering any kind of interference, more often seen as an intermittent blip, by checking the following that may help to resolve;
Make sure you have a good 6-8 inches free on all sides of the puck.
Do not stack the puck on top of any other device.
If you can, have the puck in the open, not tucked away in a cabinet or sat directly behind the TV.
Make sure you have no other devices that can cause interference closeby, like cordless phones, radiators, baby monitors, smart meter in home displays, microwaves and the like.
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