I’ve had similar experiences with it telling me to call functions of third party libs that don’t exist. When you tell it “That function X does not exist” it says “I’m sorry, your right function X does not exist on library A. here is another example using function Y” then function Y doesn’t exist either.
I have found it useful in a limited scope, but I have found co-pilot to be much more of a daily time saver.
I agree, my regex experience was not great.