Thanks for raising this with us.
Are you experiencing the issue with devices that's connected via WiFi?
Do you have a computer that is wired to the router? If yes, does it give you the same problem?
If it only occurs via WiFi, then aside from changing the WiFi name and password, have you tried changing the channel of the network?
Here are the articles that we've created to improve your home WiFi network.
Let us know how it goes.