No it's a new bug with fuel Mixture. All the keys are mixed (old ones and the one you hve setted by yourself). When you switch to a blue planes (109 - 110) and this happens, make sure you press any keys that are related to the fuel mixture ctrl (for me from time to time it's even mixed with the ChatBAr windows
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For example in the 110, yesterday was the first one I saw both ctrl lever of the fuel mixt. pushed full bckward.