I was confused why https://chat.openai.com https://chat.openai.com suddenly redirects to https://chatgpt.com https://chatgpt.com which results in connection ref

I was confused why https://chat.openai.com https://chat.openai.com suddenly redirects to https://chatgpt.com https://chatgpt.com which results in connection refused. Turns out chatgpt.com is in many blocklists (e.g. Pi-Hole) due to it being a potentially unsafe Domain before OpenAI acquiring it. So heads up if you use Pi-Hole / AdGuard etc.!