Senegoid:
The whole premise of this thread in the first place is that a plane is maneuvering in confined terrain. As already noted, air flows are disrupted and do funny things in places like that. So it’s entirely possible that, just in the distance from one wing-tip to the other, you could have air moving in different directions (vertically as well as horizontally). The whole process of large uniformly moving air masses simply doesn’t apply to this conversation.
Banking a plane increases the angle of attack on the down-going wing (only while the plane is actually rolling, not after it’s rolled to where the pilot wants it), increasing the chances of that wing stalling. But encountering an updraft that lifts just one wing and not the other, can do the same thing. Gliders, especially high-performance ones with their 18-meter wingspans, are especially susceptible to stuff like that.
When flying a plane in a crater, all bets are off.
So many errors here. Banking does not increase the angle of attack of the wing. Angle of attack is controlled by the elevator, or the trim, which is used to compensate for the *loss of lift *due to the bank. A continuing bank condition without backpressure on the yoke is the beginning of a graveyard spiral.