Upload Speed consistenly dips below 1 Mbps between 8:45 PM and 9:15 PM

So I play an competitive online game on my Nintendo switch againsst other players.   I usually don't have problems with the connection during the game or early evening. 

But recently, between 8:45 PM and 9:15 PM, the upload speed just drops and I keep getting disconnected from the game.  I check the upload speed on my Switch (and confirmed on my phone) that the upload speed is way below 1 Mbps. 

is it just the neighborhood and everyone's using the Internet at the time or what?  It's happened quite frequently in the past few weeks.  I'm not always online at this time but when I've been on, I've had the problem.   I can't tell you when the problem resolves itself as I usually just get frustrated and stop playing and do something else.

Thoughts?