Improve the patch to check the pipe and to handle above head placement.

src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/listeners/PaperPatch.java

@@ -1,8 +1,14 @@
 package us.myles.ViaVersion.protocols.protocol1_9to1_8.listeners;
 
+import org.bukkit.block.BlockFace;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.block.BlockPlaceEvent;
+import us.myles.ViaVersion.ViaVersionPlugin;
+import us.myles.ViaVersion.api.ViaVersion;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.Protocol1_9TO1_8;
 
 public class PaperPatch implements Listener {
 
@@ -15,8 +21,18 @@ public class PaperPatch implements Listener {
 
     @EventHandler(ignoreCancelled = true)
     public void onPlace(BlockPlaceEvent e) {
-        if (e.getPlayer().getLocation().getBlock().equals(e.getBlock())) {
+        if (ViaVersion.getInstance().isPorted(e.getPlayer())) {
-            e.setCancelled(true);
+            UserConnection userConnection = ((ViaVersionPlugin) ViaVersion.getInstance()).getConnection(e.getPlayer());
+            if (userConnection == null) return;
+            if (!userConnection.get(ProtocolInfo.class).getPipeline().contains(Protocol1_9TO1_8.class)) return;
+
+            if (e.getPlayer().getLocation().getBlock().equals(e.getBlock())) {
+                e.setCancelled(true);
+            } else {
+                if (e.getPlayer().getLocation().getBlock().getRelative(BlockFace.DOWN).equals(e.getBlock())) {
+                    e.setCancelled(true);
+                }
+            }
         }
     }
 }