I’m getting this same problem, but the weird thing is that my sister, who plays on the computer literally right next to mine, has no problems whatsoever! It’s only ever me who stalls out and gets kicked back to the character selection screen. The game will either suddenly kick me out, or it will start stalling everything ingame- my pet stops following, interactive actions stop working, and eventually I get kicked out. It is incredibly frustrating!
The worst thing is that it is unpredictable! Sometimes I have a smooth gaming session, but other times I can’t even get past the loading screen- my game just freezes up and stays there indefinitely.