Also about a month ago when it turned cooler (like 40-45°F), I ran Smokeboost while doing a brisket with another brand of pellets. The Smokeboost temp dropped below 150°, and it kept dropping over the next half hour or so until it was below 115°, and the grill detected a "flame out". I took the brisket back inside and opened the diffuser up, and man it was hot even with gloves (I won't be doing that again). There was still a small flame going. I had to shutdown the grill, and when I restarted it I just set the temp to 250° and moved on.
I messed with it without food the next day, and I preheated the grill to 300° before using Smokeboost and the other brand pellets. The temps didn't drop below 155° after I switched to Smokeboost, so it had me thinking preheating helped, but I don't know if that actually had any impact. And I haven't had any issue when using the Weber pellets. It was probably just a fluke, but it had me wondering if the latest firmware update messed with it, or it was just the cooler temps and thicker pellets.