diff --git a/core/block_dragger.ts b/core/block_dragger.ts
index 5809f7484..0a2cb0f33 100644
--- a/core/block_dragger.ts
+++ b/core/block_dragger.ts
@@ -346,6 +346,7 @@ export class BlockDragger implements IBlockDragger {
 
   /** Fire a move event at the end of a block drag. */
   protected fireMoveEvent_() {
+    if (this.draggingBlock_.isDeadOrDying()) return;
     const event = new (eventUtils.get(eventUtils.BLOCK_MOVE))(
                       this.draggingBlock_) as BlockMove;
     event.oldCoordinate = this.startXY_;
diff --git a/core/mutator.ts b/core/mutator.ts
index d5a051f52..58ce528e9 100644
--- a/core/mutator.ts
+++ b/core/mutator.ts
@@ -460,21 +460,7 @@ export class Mutator extends Icon {
       const block = this.getBlock();
       const oldExtraState = BlockChange.getExtraBlockState_(block);
 
-      // Switch off rendering while the source block is rebuilt.
-      const savedRendered = block.rendered;
-      // TODO(#4288): We should not be setting the rendered property to false.
-      block.rendered = false;
-
-      // Allow the source block to rebuild itself.
       block.compose!(this.rootBlock);
-      // Restore rendering and show the changes.
-      block.rendered = savedRendered;
-      // Mutation may have added some elements that need initializing.
-      block.initSvg();
-
-      if (block.rendered) {
-        block.render();
-      }
 
       const newExtraState = BlockChange.getExtraBlockState_(block);
       if (oldExtraState !== newExtraState) {
diff --git a/package-lock.json b/package-lock.json
index aa62e50ef..518096d91 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "blockly",
-  "version": "9.3.1",
+  "version": "9.3.2",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "blockly",
-      "version": "9.3.1",
+      "version": "9.3.2",
       "hasInstallScript": true,
       "license": "Apache-2.0",
       "dependencies": {
diff --git a/package.json b/package.json
index ed1d14fa5..077724ae4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "blockly",
-  "version": "9.3.1",
+  "version": "9.3.2",
   "description": "Blockly is a library for building visual programming editors.",
   "keywords": [
     "blockly"