Forge version: 36.0.19
Twilight Forest version: 1.16.5-4.0.349

When using the Peacock Feather Fan's upwards jumping ability, the jump boost effect is applied but the player takes fall damage anyway when hitting the ground even if the jump boost effect is still active. The jump ability also doesn't consume durability on the Fan but the mob pushing does, I don't know if this is intentional or not.