I've heard that about
HF. I've also heard that about Roots Organic, after I started using it. Never got them from the bag. I got them
once from an open bag of cheap ass compost. The best way I have avoided them is to have a living soil with good bugs in my Earthboxes. It comes from FRESH EWC from my own worms or a quality EWC. This last run, I got a bag of EWC from Build A Soil and top dressed with it at the set up. LOTS of good life in it, but it's not very cost-effective. Your own is best.
After my shower, I gotta examine the roots of the girls I just chopped. It will go back into a tote, broken up and mixed and re-amend and left to cook a bit. Will probably mix up Some Recharge and spray it too. That might help break stuff down better, but the colder temps may slow it quite a bit and I'm not doing it inside.