diff --git a/lib/reducers/dm-operations-queue-reducer.js b/lib/reducers/dm-operations-queue-reducer.js
--- a/lib/reducers/dm-operations-queue-reducer.js
+++ b/lib/reducers/dm-operations-queue-reducer.js
@@ -1,7 +1,11 @@
 // @flow
 
+import { setClientDBStoreActionType } from '../actions/client-db-store-actions.js';
 import type { DMOperationStoreOperation } from '../ops/dm-operations-store-ops.js';
-import { dmOperationsStoreOpsHandlers } from '../ops/dm-operations-store-ops.js';
+import {
+  dmOperationsStoreOpsHandlers,
+  dmOperationUnshimmedType,
+} from '../ops/dm-operations-store-ops.js';
 import {
   clearQueuedDMOpsActionType,
   pruneDMOpsQueueActionType,
@@ -79,6 +83,27 @@
       store: processStoreOperations(store, operations),
       operations,
     };
+  } else if (action.type === setClientDBStoreActionType) {
+    const newQueuedOperations = action.payload.queuedDMOperations ?? {};
+
+    const shimmedOperations =
+      action.payload.dmOperations
+        // Only already unshimmed operations should be added to the store.
+        // Other types are still unknown to the client.
+        ?.filter(op => op.type === dmOperationUnshimmedType)
+        ?.map(op => ({
+          id: op.id,
+          operation: op.operation,
+        })) ?? [];
+
+    return {
+      store: {
+        ...store,
+        ...newQueuedOperations,
+        shimmedOperations,
+      },
+      operations: [],
+    };
   }
   return { store, operations: [] };
 }