While a player is fishing in a boat, the drop from fishing sometimes would fly over the player's head, causing the player unable to pick up the item.

I tried to reproduce this bug and found that this phenomenon usually occurs while the player is facing a certain angle. To be more accurate, when you open the F3 menu, the second number of "Facing" (the vertical rotation) is around 38, and the player needs to face at the same angle of the boat horizontally (I do it by pressing F3+B to show the boat's hitbox, then align my crosshair on the boat's blue line). I believe that the horizontal rotation of the boat also affects this phenomenon.