PaperMC/paper-server/patches/sources/net/minecraft/world/item/SignItem.java.patch

--- a/net/minecraft/world/item/SignItem.java
+++ b/net/minecraft/world/item/SignItem.java
@@ -13,6 +13,8 @@
 
 public class SignItem extends StandingAndWallBlockItem {
 
+    public static BlockPos openSign; // CraftBukkit
+
     public SignItem(Block standingBlock, Block wallBlock, Item.Properties settings) {
         super(standingBlock, wallBlock, Direction.DOWN, settings);
     }
@@ -35,7 +37,10 @@
                 if (block instanceof SignBlock) {
                     SignBlock blocksign = (SignBlock) block;
 
-                    blocksign.openTextEdit(player, tileentitysign, true);
+                    // CraftBukkit start - SPIGOT-4678
+                    // blocksign.openTextEdit(entityhuman, tileentitysign, true);
+                    SignItem.openSign = pos;
+                    // CraftBukkit end
                 }
             }
         }