This is worth investigating. Did you try to use "Uniform Resource Locator" instead?
Or did you try to make it say the word "URL" first, with such a question as "What do we call the specific web address that identifies the location of a resource on the internet?"
PS: Bard is still not available where I am at.
LLMs predict the most likely text to come next, so they have a tendency to hallucinate URLs based on existing patterns. It's not really a big, it's the core thing it does.
This is worth investigating. Did you try to use "Uniform Resource Locator" instead? Or did you try to make it say the word "URL" first, with such a question as "What do we call the specific web address that identifies the location of a resource on the internet?" PS: Bard is still not available where I am at.