I've been having a lot of connection problems recently starting around three weeks ago. I have made no changes to my setup or activity in that time. For science, I timed the outages with a continuous ping and it was surprisingly consistent. Starting at the end of an outage, times in minutes:seconds.
at this point I waited a minute and then power cycled the modem. It took about two minutes to come back up. After that I waited a minute and a half until the next outage for a total of 4:38 up. So the pattern is consistent even when the modem is reset.
This is on a direct wired connection to the modem. I see no obvious changes to the modem lights during outages. It is happening all the time and makes most games unplayable. Anecdotally a friend of mine in a building a block away reports the same behaviour, so this is potentially something outside my building and affecting a lot of people.