I have 15 down and 5 up, and connect very quickly with mine. However, I have an Amplifi HD mesh system now, and I think that may be why I don’t have as many connection issues. When I had an R7000, my connections weren’t as reliable, and that’s why I moved to mesh.
What response do you get when you select just one camera? Does it connect quickly? Below is the connectivity troubleshooting guide.
If that doesn’t solve it, keep in mind that this is primarily a user-to-user forum. If you don’t get help here from the community, file a support request including log files. That will ensure that the logs are captured. You might want to submit the ticket right away because there’s somewhat of a backlog. You can always let them know it’s already resolved when they contact you.