Wind charges prevent fall damage accumulation above the launch height even if the player has landed on a higher area. this only lasts for a few seconds.

To reproduce, build a 5 block high pillar, use a wind charge from the ground to launch yourself and land on the pillar, then quickly walk off to fall back on ground

Observed behavior: The player will not take damage.

Expected behavior: The player will take fall damage, since they have previously landed and the wind charge damage negation should no longer be in effect.

In one of the videos, the player takes fall damage as expected since there was a longer delay between landing on the pillar and landing on the ground. In the other video, the player does not take fall damage, even though the same thing happens, but faster.