When you are using an item, you get a speed multiplier which slows you down. When you throw away the item while using it, the speed multiplier stays as long as you hold the use key, even though you are not using an item anymore.

Steps to reproduce:

1. Open a new world with cheats enabled

2. Make yourself hungry (`/effect give @s hunger 3 127`)

3. Give yourself 1 bread (`/give @s bread`)

4. Start eating the bread while holding it in your main hand (right-click by default)

4a. Notice how your horizontal movement is slower while eating

5. Throw away the bread while eating it with the drop item keybind (Q by default), but still keeping your use key pressed

5a. Notice how your horizontal movement is still slowed even though you are not holding nor using an item anymore

6. Release your use key

6a. Notice how now the horizontal movement returns to normal speed

Expected behaviour:

After throwing away the bread (step 5), the horizontal movement speed should immediately return to normal, not only after releasing the use key.