Orbi wifi speed has degraded because of firmware 2.5.1.8 on satellite?

I am having the exact same problem here. I came to the community looking to ask the same question if I couldn't find an existing thread. I just started noticing the degredating when a class I was teaching over Zoom started cutting in and out. Speed tests from the iOS app show around 900Mbps down 42Mbps up. But any device connected wirelessly get around 10Mbps. The link rate on the Macbook I'm on now sitting 10 feet from the router is 54Mbps. I was on firmware 2.5.1.8 on both the router and satellite for the past while, so I upgraded it to 2.1.5.16 on both. I guess I'm going to try downgrading now.