First packer cut brisket. 11lbs+. Put it on at 10:30 last night expecting 12-15 hours. Smoked at 240-250. Checked the Egg temp (did not check the brisket temp) at 11pm, 1am, 3am, and 5am. All good. Woke up at 6:30 and inserted the meet thermometer - 207 degrees!!! Looks like its ruined. What the heck happened?