In T134754#2114573, @Leopard20 wrote:

It's not a bug. It's the "autopilot" system.

This is still an issue in 2.00 RC but I took the time to test more in depth. While testing in multiplayer with the F/A-181 Black Wasp 2 (Stealth) pressing ESC to open the escape menu will do one of three things.

1. If the engine of the jet is off the speedbrake is automatically applied, when the menu is closed the speedbrake will be released.
2. If the engine of the jet is on and thrust is at 0 it will randomly apply thrust making the jet move forward on it's own.
3. If the engine of the jet is on and thrust is greater then 0 the thrust will be set to 0, speedbrake will be applied, tail flaps will be up (As if you were taking off), and wing flaps will be 100% down. When closing the menu the speedbrake is released and the tail flaps will return to level but the wing flaps will stay down and always remain down until the player raises them.

I'm also experiencing this issue. Anytime a UI is opened with the engine on will alter the thrust randomly while if the aircraft has it's engine off and a UI is opened the airbrake will be applied. This happens to both default UI's like the escape menu as well as user made UI's.