Holding the "Use" button continues to slow down the player even after the used item has been dropped

When holding a item that slows you down when holding right click, when the item is dropped whilst holding right click (Spyglasses, Shield, and more) you still maintain the slowness of that item as if it was used, but no effect is occurring, you don't see the overlay of the spyglass, nor you get protected by the shield, although once you remove right click the effect goes away.

How to reproduce:

1. Get any item that slows you down when using it.
2.  Press the "Drop" button on your keyboard to remove the item   
   The item previously held stills slow you down when holding the right click button or the use button and doesn't revert to walking speed unless stopped right clicking or using.