Fix activation range to ignore FallingBlocks

src/main/java/org/spigotmc/ActivationRange.java

@@ -14,6 +14,7 @@ import net.minecraft.entity.EntityCreature;
 import net.minecraft.entity.item.EntityEnderCrystal;
 import net.minecraft.entity.boss.EntityDragon;
 import net.minecraft.entity.projectile.EntityFireball;
+import net.minecraft.entity.item.EntityFallingBlock;
 import net.minecraft.entity.item.EntityFireworkRocket;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.entity.EntityLiving;
@@ -100,6 +101,7 @@ public class ActivationRange
                 || entity instanceof EntityFireball
                 || entity instanceof EntityWeatherEffect
                 || entity instanceof EntityTNTPrimed
+                || entity instanceof EntityFallingBlock // PaperSpigot - Always tick falling blocks
                 || entity instanceof EntityEnderCrystal
                 || entity instanceof EntityFireworkRocket
                 || entity instanceof EntityVillager