Ifly 747-400 bouncing around on the tarmac and pmdg 747-400 display

Hello, great flying people out there.
i have a problem with ifly747-400,SP 3 installed also sid and star package.
it bounces up and down some times when its on the tarmac.when its waiting to get people onboard. even when the plane is fully dark and cold.
it mostly happend when i switch view from inside to outside.
<2d cockpit to spot> sometimes it jumps that high that the plane dive nose down in to the ground??
what is wrong or did i do something wrong?
the only mods i use when flying is fs maps and fs pasengers.
i have used pmdg 747-400 - queen of sky before but that plane don't jump only the displays after dark and cold it jumps on 10 seconds and after that it stays dark forever. but they are still running
i have a problem with ifly747-400,SP 3 installed also sid and star package.
it bounces up and down some times when its on the tarmac.when its waiting to get people onboard. even when the plane is fully dark and cold.
it mostly happend when i switch view from inside to outside.
<2d cockpit to spot> sometimes it jumps that high that the plane dive nose down in to the ground??
what is wrong or did i do something wrong?
the only mods i use when flying is fs maps and fs pasengers.
i have used pmdg 747-400 - queen of sky before but that plane don't jump only the displays