The ideal way that ActivityPub federation works IMO is a bunch of smaller nodes coming together to make a large network.
If you have a bunch of people all on one or two instances then you’ll have a “central hub” of the network that’s constantly overloaded.
That’s my advice to community builders on this platform… Spread out across smaller instances, don’t just all sign up to a big one.
Sometimes when you put it to sleep, it doesn’t actually sleep and the screen stays on but black.
Only thing that seems to fix it if holding down the button until it turns off, then turning it back on again.