To update that to what we know,
Web Browser (app.glowforge.com) >>>>> Internet >>>>> Glowforge ‘Cloud’ >>>>> Internet >>>>> Glowforge Basic/Pro.
Which means, to control the glowforge- your traffic does two round trips over your internet connection. Specifically your wireless connection if the device that’s accessing the control page (app.glowforge.com) is also using.
After using one and setting up others for a couple years now, The Glowforge is good at making ‘okay’ to ‘moderate’ wireless connections bad. This is not due to the bandwidth consumption, mostly on how many times does each side have to rebroadcast if the connection is bad. Then eventually timeout.
As stated before, TV streaming services (Netflix, Hulu, Amazon Prime & etc…) or devices like Roku, Apple TV & the likes are not the best way to benchmark wireless connections. As those services buffer and provide ‘look ahead’.
The best test if possible is to move the unit closer to the access point. If that does not correct it then run a couple benchmarks from a device wired into your network then again wireless. If there is a big discrepancy you may want to invest into a new wireless router or a mesh network (Google Wifi is pretty damn good.)