Cliq Bot not responding to forwarded messages

I have created a simple Cliq chat bot that takes in a URL and provides a response, and it works as expected when copy-pasting the URL and sending it to the bot. However, when messages are forwarded from other conversations to the bot, it completely ignores them. They will appear in the chat history, but none of my code is executed nor is a response provided.

Is this intentional? Is there anywhere else apart from the Message Handler I should write code to handle forwarded messages?