Internet Speed drops from Orbi to Macbook

[scoboo]

I own an Orbi RBR750 router device and two satellites.

We pay for Gigablast from Cox.

The Internet Speed feature on my Orbi app says bandwidth is over 600mbps.

When I run a speedtest on my MacBook, speed is about 20mbps. This deterioration has happened within one week.

My ISP cannot figure out the problem. I own a Netgear modem (CM1100) but purchased a CM1200 to check if there was a modem issue.

The Orbi device and modem are less than 8 months old.

Anyone got ideas or feedback?

[FURRYe38]

Netgear has set up a community forum specifically for the Orbi AX (WiFi 6) products. Most of the people who watch that forum are more likely to have experience with Orbi AX and know how to work it better than those of us who follow this "general Orbi" forum. Might be more likely to find someone who has a solution if the question is posted there:
https://community.netgear.com/t5/Orbi-AX/bd-p/en-home-orbi-ax

Thank you.