Unexpected Fast Cook Time So Far - How can this be?

This is 4th cook on Lone Star Grillz Insulated Vertical Cabinet.

Set Guru for 225. Cooking with water.

When at temp at 6 pm loaded 3 racks of baby backs, two 9 lb pork butts and one 12 lb (trimmed weight) brisket. 4.5 hours later, guru shows brisket at 167 and pork butts at 167 and 164. I would have guessed that these cook times are physically impossible.

I didn't believe it, so I checked with Thermapen. ITs confirmed.

Figured that grill temp was off, so I put Maverick probe in.

Just checked, guru shows 230, and Maverick shows 239.

I started at 6pm as I was counting on 12-15 hour cook times that I saw with Vision Kamado.

If I continue to see such short cook times, really going to change start times.

Any reason the LSG would cook some much quicker than Kamado?

BTW, I wrapped brisket in pink butcher paper since I normally do at around 160-170. I did not see the dark, rich bark I normally see.

I still don't believe my lying eyes. We'll see how long it takes for brisket to probe tender.

Cheez was right

So I pulled the pork butts at 3am after 9 hours. Both were bone-in, and bones turned loose.

Brisket went to 10.5 hours, and probed tender, so I pulled at 430am, let it stand for 15 minutes, then into cooler, and I went back to sleep.

Really had me confused, and I clearly wrapped it too soon. When I posted, I figured stall was over, based on IT.

Maybe I should cook at 300 using Bludawg's method to power right through the stall.

Thanks for your replies.

Big Swole, good to know that your IVC also cooks faster than your other smokers, which is definitely what I am seeing.

I have been using IT only to determine when to wrap brisket, as I don't wrap pork butts. I have gotten the message on ignoring IT to determine when done.

To all, thanks for all your help.