While preparing for landing, plane is still in autopilot "nav" or "approach" and ATS is still activated, I started the before landing checklist. Part of that checklist, the first officer performs "set take-off/go around" thrust. ATS will disconnect and suddenly airspeed immediately spools up, plane begin to pitch up caused by the increased thrust. As such, I'll have to manually regain control of the thrust levers, readjusted the airspeed and finally reactivated ATS. From what I've described, is that normal? This happens every time I start the said checklist.
Thanks.