pmdg 777 throttle

hi guys i am huge fan of pmdg but i just bought the pmdg 777 and i found alot of bugs also does anyones when  pmdg 777 going land and the plane says 20 and u put ur throttle to idle and flare when it thouches the ground its throttle will gain power by itself and takeoff again but i see is that i did not off the autothrottle i thought pmdg will off by itself by the way i using ils app does any one know how to fix it if know please share thanks you so much for reading this