2002 Nissan Frontier performance issue

I have a 2002 Nissan Frontier supercharged with a little over 200,000 miles on it. The truck runs great except for the fact that off the line it gets up to speed fairly quickly when the engine is cold. But when the engine gets up to operating temperature the engine performance drops off. When floored off the line with the engine cold it gets up to speed quick but when it’s to OT and it’s floored, it lungs down and starts to move slowly up to speed until the supercharger kicks in. Why does this happen? Does anyone have a similar issue with their car?