"Planes may get stuck into windgens, solars, or even ground. Frustrating and costly. (dont try to reclaim the unit your plane is stuck into, it will fail...reclaim the plane.)"
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i think this is actually an issue with the landing pad on the factory. or maybe its two different issues. sometimes planes will not land correctly on the landing pad, retaining some of their movement after landing and then sliding off the pad, resulting in a blocked pad and an aircraft beeing, as you said, stuck in the position unable to lift off again with reclaiming beeing the only option to fix. this is especically harmful if you, say, rush a licho and on the first run it breaks and you have to reclaim it, all the while your factory cant service any other planes. didnt happen to me lately tho, maybe its already fixed.
another thing is that planes, if they have a "repair at %" setting enabled, ignore any commands and fly to the next available airpad when in need of repair. this can be very dangerous if there is enemy aa next to the airpad or on the way there (like when your teammate has an aircraft carrier parked in someones screamer range, which may even result in the carrier beeing destroyed too).