I encountered this problem exactly a week ago and it has not gone away since. I have tried every single remedy I could find on the internet, from restarting the modem and router to flushing the DNS, etc.
The problem manifests itself in this way: everything is absolutely fine until it isn't. That sounds horribly vague but it describes the problem perfectly. My internet works perfectly fine, I get all the speeds that I'm accustomed to but then it will drop the connection momentarily, anywhere from 1 second to 5 seconds. It is completely random. I can go a long while without it happening or it could completely cripple browsing the internet. I cannot play any online games as the internet connection is not stable enough to maintain a smooth gaming experience. Watching a live stream is difficult as well.
Modem model is a Motorola sb5120.
Has anyone experienced this issue? How did you solve it?