Ages ago I had some germination issues with some single seeds I got from Herbies. I then learnt about sterilising seeds as part of the germination process in order to kill any bacteria or fungus hanging around on the outside of the seed that could potentially kill the seedling as soon as the seed cracks.
Problem resolved right there. Rest of my old Herbies seeds stash popped no problems. This doesn’t seem to be so much of a problem when you buy a breeder pack as no-one has handled the seeds in-between you & the breeder but if you buy a single or a have a pack split open for you it is definitely worth sterilising. Someone at Herbies has grubby mits for sure.