That's kind of the point and how's it different than a human. A human is going to weight local/recent contextual information as much more relevant to the conversation because they're actively learning and storing the information (our brains work on more of an associative memory basis than temporal). However, with our current models it's simulated by decaying weights over the data stream. So when you get conflicts between contextual correct vs "global" correct output, global has a tendency to win out that is more obvious. Remember you can't actually make changes to the model as a user without active learning. Thus the model will always eventually return to it's original behaviour as long as you can fill up the memory.