Is it a new trend for the response to "thank you" to be "of course?"?

On two separate occasions, today on TV, when the host thanked the guest for coming on the show, the guest’s response was “of course.”

Is this a new trend?

I know the trendy response previously, to “thank you” was “no problem.”

I was getting used to “no problem” but I find “of course” to be annoying.