Some of the links on this forum allow SMF, at no cost to you, to earn a small commission when you click through and make a purchase. Let me know if you have any questions about this.
Yes, they most certainly can. You are in the stall (plateau) when this occurs. Depending on the smoker and ventilation, I've seen this occur anywhere from the lower 140's to upper 160's range.
Just hold your chamber temps steady and let it ride. It will test your patience and make you second-guess your probe readings, but things are going fine.