Gravity not functioning correctly

I created two custom items: a pair of boots that make the player "overweight", and an block that makes the player "weightless".

The bug occurs with the following steps:

Hold the weightless block. The player becomes weightless correctly.

While still holding the weightless block, put on the overweight boots. The weightlessness isn’t correctly overridden by the boots. weightless block, take off the boots. Expected behavior: The player should become weightless again because the boots are gone and I am still holding the weightless block. Actual behavior: The player remains on the ground with normal gravity and does not regain the weightless effect. The effect does not return until I drop and re-pickup the weightless item, or re-equip the boots.