Bows, crossbows, and tridents drawn in survival/creative/adventure mode can be released in spectator mode

Confirmed for 17w15a

Confirmed for 17w17b

Confirmed for 1.12-pre5

Confirmed for 18w44a. It should be noted that tridents exhibit the exact same behavior, and the title/description should be changed to reflect this.

Confirmed for 19w04b (partially). The player can still throw a trident in spectator mode, but they cannot shoot an arrow using a bow.

Never mind, it still affects bows, and they in fact shoot arrows, given that you have one in your inventory (a fact I overlooked when I initially tested this). Can someone remove the notice in the description that it was presumably fixed for bows? Thanks.

Confirmed in 1.15.2 and 1.16 Pre-release 6.

Confirmed for 1.16-rc1

This is quicker and easier to reproduce usign F3 + N.

If you do this, you will even consume the arrow or trident in spectator mode.

Can confirm in 20w51a.

Requesting ownership as the owner has been inactive since 2019

What owner.

They meant the reporter.

In 21w03a

Can confirm in 21w05b.

Can confirm in 21w06a.

Can confirm in 21w07a. Video attached.

Can confirm in 21w11a.

Can confirm in 1.17.

Can confirm in 1.17.1.

Can confirm in 1.18.1. In my testing, it appears that sometimes you are able to shoot projectiles shortly after switching into spectator mode, and sometimes you aren't. Regardless, the movement speed slowdown from using these items is apparent 100% of the time. Here's a code analysis along with a fix regarding this issue.

Code Analysis:

The following is based on a decompiled version of Minecraft 1.19.2 using MCP-Reborn.

net.minecraft.server.level.ServerPlayer.java

public class ServerPlayer extends Player {
   ...
   public boolean setGameMode(GameType gameType) {
      if (!this.gameMode.changeGameModeForPlayer(gameType)) {
         return false;
      } else {
         this.connection.send(new ClientboundGameEventPacket(ClientboundGameEventPacket.CHANGE_GAME_MODE, (float)gameType.getId()));
         if (gameType == GameType.SPECTATOR) {
            this.removeEntitiesOnShoulder();
            this.stopRiding();
         } else {
            this.setCamera(this);
         }

         this.onUpdateAbilities();
         this.updateEffectVisibility();
         return true;
      }
   }
   ...

If we look at the above class, we can see that only two methods are called when a player switches into spectator mode. These methods are removeEntitiesOnShoulder() and stopRiding(). This basically means that when a player changes into spectator mode, any entities that are riding on their shoulders will be dismounted, along with the player themselves being dismounted if they are riding any entity. As a result of only these two methods being called, the player can continue to use items even after switching into spectator mode.

Fix:

Simply calling the stopUsingItem() method where appropriate within this piece of code will stop players from using items upon switching into spectator mode, thus resolving this problem. The following line code can be used to fix this issue.

this.stopUsingItem();

Confirmed in 1.18.1