The stall really does vary from each cook/smoke even with the same meat.
Take three briskets on three different days all within a pound of each other and the stall will vary. Moister/fat content of each brisket will vary due to growth/feed, processing/packaging, time/distance, pre-frozen/fresh and that's not even taking into consideration of ambient temp and humidity.
The stall usually happens around 160 up to 175 and it can sit there for three or four hours depending... If your using the proven temp of 225 it will always "eventually" climbs on up. Time is your friend and a finished IT of 195/205 is the sweet spot with a 2hour+ hold over. On a 12lb BB or brisket 16hrs is normal for my smokes although I wrap in foil when the meat starts the climb out of the stall and then put it back in to finish. The really hidden trick to a moist smoke is the wrap and 2+hours "cool down".
Good luck and keep smoking ...just need to back track and allow 18hrs start to finish has been my experience.