Same. I also got the same blazer and did not notice a weed smell on it.I did not notice any weed or chemical smell in several jackets/suits that came recently, including the cashmere hopsack. Smell noticed by others could come from courier and storage during transport. Maybe there is a country-specific link?
Since the blazer is fresh in the discussion, is this fabric prone to pilling/fuzzing? I know some cashmere will pill easily, but I'm not experienced with cashmere in a hopsack weave.