Hello, I have recently encountered a very difficult problem. When I was on the 3D cockpit perspective and external perspective, the perspective always moved down automatically. When I tried to restore the preset perspective, it started moving again.
I use keyboards, mouses, Tumaste Boeing YOKE and throttle. I did not find the shortcut keys that were triggered by the control options. This problem bothered that I could not fly.
Thanks!
Moved to Tech Talk which is more appropriate whilst other users help you troubleshoot the issue 
Do you have an Xbox / joypad controller plugged in also? Could be the stick is drifting.
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Restore the mouse and keyboard to the default settings and see if that solves it. If not try setting the yoke and throttle to default. Once the problem stops, restore your control settings one at a time and you’ll find the problem.
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Do you have the little joystick on the Boeing Yoke mapped to look around? If you do, the joystick itself is drifting (hardware problem). Mine does the same thing. It’s easy to test, just unbind the joystick on the yoke in the software settings and the drift will stop.
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