Using v2.3.1
1. Have 2 full team of soldiers (i.e. 16 soldiers), each assigned to a dropship, in the same base
2. Go into the base, click aircraft
3. Click on the second ship (The ship you get later in game) in the ship selection part (topleft)
4. Scroll down and select a soldier (bottomleft)
5. Click on the first ship in the ship selection part
6. Select a soldier and you will find that the soldier data shown on the bottomright is not the one you selected.