Over the past 6 months my Nest WiFi mesh system has been having issues with internet speed. I currently get 300MB/sec from my cable modem to my main unit in the house but one of my Mesh units no further than 50 feet away seems to drop its speed to 10MB/sec daily. When I unplug the unit, my speed jumps to 150MB/sec or more for about 4-6 hours before it starts to drop again. Its very frustrating.
When I run a speed test from Google Home I get 300MB per second to my base station.
When I run a speed test from my Studio I will notice that the speed starts out at 160MB after it has been freshly rebooted but within hours it will drop to 10MB per second
I have factory reset the mesh unit and even switched devices around but I experience the same issue.
Sorry for the speed issues you're seeing. I'm sure that's quite frustrating to have to go through those reboots to get expected speeds. Thanks for providing the info about your setup. I have a couple of things for you to try to see if it impacts things.
If you can give me a bit more info, we can sort out what's happening here. I look forward to hearing from you.