What's Missing in AI Chatbots for E-commerce? Share Your Insights!

I am researching about AI ChatBot in e-commerce space to help with my prototype. If you often do your online shopping, please help me with 3 questions to better my understanding about this space. 1. Can you describe a situation where an AI chatbot failed to meet your expectations or caused a problem in your shopping experience? 2. What specific functionalities do you find lacking or insufficient in current AI chatbots like Tidio, Intercom, or chatbot.com? 3. What changes would you think to enhance the effectiveness of AI chatbots in improving customer interaction and sales in e-commerce?