I also saw the tweet complaining about stems. Here's a couple complaints just from a quick search. Seems like tweed is correcting it. All buds have a stem, when they grind them, the stem remains and looks bad. The only way to correct the problem would be to go through each batch to remove them. Not an easy problem to fix I'm sure they figure it out.
@topgunnarson good to hear your rep is on it. Thanks for the feedback. Aside from that, how was the effect?