Water Soldier: remains upside down, floating at an angle in the water or sinking to the bottom.
The Watersoldier a floating plant.
This is completely normal and there is nothing you need to do about it. The supplied watersoldiers are young plants (cuttings) and as soon as they are placed in the water, they will start to form properly in the water within a few days. The sunlight will make them stand upright.