RBR40 Netflix buffers at night

What Firmware is currently loaded?
What is the Mfr and model# of the ISP modem the NG router is connected too?

What is the size of your home? Sq Ft?
What is the distance between the router and satellite(s)? 30 feet is recommended in between RBR and RBS to begin with depending upon building materials when wirelessly connected. https://kb.netgear.com/000036466/How-far-should-I-place-my-Orbi-satellite-from-my-Orbi-router

What channels are you using? Auto? Try setting manual channel 1, 6 or 11 on 2.4Ghz and any unused channel on 5Ghz.
Any Wifi Neighbors near by? If so, how many?

Try enabling Beamforming and MIMO(MIMO may or maynot be needed) and WMM. Under Advanced Tab/Advanced Settings/Wireless Settings

Try disabling the following and see:
Armor, Circle, Daisy Chain, Fast Roaming, IPv6 and Set 20/40Mhz Coexistence to 40Mhz only. Save settings and reboot the router and satellite(s).

Has a factory reset and setup from scratch been performed since last FW update?

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djsmiles wrote:
my router works great during the day but at night watching netflix it buffers. the app shows i’m getting over 500mbps, i’ve tried restarting it numerous times, don’t know what else to do

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What device are you streaming on? 

What band is it connected to? 

this is kind of key as 2.4ghz has more interference, less bandwidth, and more sensitive to other networks. 

Or is it all streaming devices? 

If you directly connect to the router, what speeds do you get? (not through the app)

What modem are you using? 

What firmware is the orbi on?