Orbi 770 - Some Devices Lose Internet

I should preface this by saying I am not a computer or networking expert. I think I know just enough to be dangerous and be willing to do it msyelf instead of hiring someone.

I recently upgraded to the Orbi 770 from an older Orbi setup. I have the router and two satellites. I put the satellites in the same location as the older ones.

When it's working well, it's great. But my wife and son have complained about it lagging or them having trouble connecting from either her phone or his Playstation. I've noticed a few issues here and there, but it seems like it's really just some certain devices that struggle with connectivity. And our hardwired devices seem to work fine; it's only the WiFi. And I know it's not an internet issue, because some devices will be working just fine, like a TV streaming via WiFi or an Alexa device, but others are "connected" to the WiFi, but don't get any internet. If I reboot the Orbi, that normally takes care of it.

Yesterday, I was working from home and trying to get on a Zoom call. The call would not connect for a good 10 minutes. Meanwhile, I know the internet was OK because my daughters were on their iPads and my wife was streaming something on the TV. Finally, I turned off the WiFi on my phone and the call immediately connected. I then connected my iPad to my phone's hotspot, and it suddenly worked fine also.

Has anyone else experienced this? I had no problems with my old Orbi, I just upgraded because it was older and I was hoping to get some faster service. But now I'm tempted to toss the new Orbi and go back to the old. Any ideas what could be wrong?

Thank you!