diff --git a/plugos/manifest_cache.ts b/plugos/manifest_cache.ts
index d287ff39..fa810b95 100644
--- a/plugos/manifest_cache.ts
+++ b/plugos/manifest_cache.ts
@@ -23,6 +23,7 @@ export class KVPrimitivesManifestCache<T> implements ManifestCache<T> {
     const manifest = plug.sandbox.manifest!;
     await this.kv.batchSet([{
       key: [this.manifestPrefix, plug.name],
+      // Deliverately removing the assets from the manifest to preserve space, will be re-added upon load of actual worker
       value: { manifest: { ...manifest, assets: undefined }, hash },
     }]);
     return manifest;
@@ -43,7 +44,11 @@ export class InMemoryManifestCache<T> implements ManifestCache<T> {
     }
     await plug.sandbox.init();
     const manifest = plug.sandbox.manifest!;
-    this.cache.set(plug.name!, { manifest, hash });
+    // Deliverately removing the assets from the manifest to preserve space, will be re-added upon load of actual worker
+    this.cache.set(plug.name!, {
+      manifest: { ...manifest, assets: undefined },
+      hash,
+    });
     return manifest;
   }
 }
diff --git a/plugos/sandbox.ts b/plugos/sandbox.ts
index b73c3d23..95734806 100644
--- a/plugos/sandbox.ts
+++ b/plugos/sandbox.ts
@@ -32,8 +32,9 @@ export class Sandbox<HookT> {
   init(): Promise<void> {
     console.log("Booting up worker for", this.plug.name);
     if (this.worker) {
-      // Should not happen
-      console.warn("Double init of sandbox");
+      // Race condition
+      console.warn("Double init of sandbox, ignoring");
+      return Promise.resolve();
     }
     this.worker = new Worker(this.plug.workerUrl, {
       ...this.workerOptions,