src/main/java/StevenDimDoors/mod_pocketDim/blocks/BaseDimDoor.java

@@ -441,7 +441,10 @@ public abstract class BaseDimDoor extends BlockDoor implements IDimDoor, ITileEn
 		// We MUST call super.breakBlock() since it involves removing tile entities
         super.breakBlock(world, x, y, z, oldBlockID, oldMeta);
         
-        // Schedule rift regeneration for this block
+        // Schedule rift regeneration for this block if it was replaced
+        if (world.getBlockId(x, y, z) != oldBlockID)
+        {
         	mod_pocketDim.riftRegenerator.scheduleFastRegeneration(x, y, z, world);
         }
     }
+}

src/main/java/StevenDimDoors/mod_pocketDim/blocks/BlockRift.java

@@ -466,7 +466,10 @@ public class BlockRift extends Block implements ITileEntityProvider
 		// We MUST call super.breakBlock() since it involves removing tile entities
         super.breakBlock(world, x, y, z, oldBlockID, oldMeta);
         
-        // Schedule rift regeneration for this block
+        // Schedule rift regeneration for this block if it was changed
+        if (world.getBlockId(x, y, z) != oldBlockID)
+        {
         	mod_pocketDim.riftRegenerator.scheduleSlowRegeneration(x, y, z, world);
         }
     }
+}

src/main/java/StevenDimDoors/mod_pocketDim/blocks/TransTrapdoor.java

@@ -140,4 +140,18 @@ public class TransTrapdoor extends BlockTrapDoor implements IDimDoor, ITileEntit
 		world.setBlockTileEntity(x, y, z, te);
 		return te;
 	}
+	
+	@Override
+	public void breakBlock(World world, int x, int y, int z, int oldBlockID, int oldMeta)
+    {
+		// This function runs on the server side after a block is replaced
+		// We MUST call super.breakBlock() since it involves removing tile entities
+        super.breakBlock(world, x, y, z, oldBlockID, oldMeta);
+        
+        // Schedule rift regeneration for this block if it was replaced
+        if (world.getBlockId(x, y, z) != oldBlockID)
+        {
+        	mod_pocketDim.riftRegenerator.scheduleFastRegeneration(x, y, z, world);
+        }
+    }
 }

src/main/java/StevenDimDoors/mod_pocketDim/tileentities/TileEntityTransTrapdoor.java

@@ -1,9 +1,8 @@
 package StevenDimDoors.mod_pocketDim.tileentities;
 
 import java.util.Random;
+
 import StevenDimDoors.mod_pocketDim.mod_pocketDim;
-import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.tileentity.TileEntity;
 
 public class TileEntityTransTrapdoor extends DDTileEntityBase
 {