Improve remove cache item

plugins/FlashSales/src/EasyAbp.EShop.Plugins.FlashSales.Application/EasyAbp/EShop/Plugins/FlashSales/FlashSalePlans/FlashSalePlanCacheInvalidator.cs

@@ -22,13 +22,13 @@ public class FlashSalePlanCacheInvalidator : ILocalEventHandler<EntityChangedEve
         UnitOfWorkManager = unitOfWorkManager;
     }
 
-    public virtual Task HandleEventAsync(EntityChangedEventData<FlashSalePlan> eventData)
+    public virtual async Task HandleEventAsync(EntityChangedEventData<FlashSalePlan> eventData)
     {
+        await DistributedCache.RemoveAsync(eventData.Entity.Id);
+
         UnitOfWorkManager.Current.OnCompleted(async () =>
         {
             await DistributedCache.RemoveAsync(eventData.Entity.Id);
         });
-
-        return Task.CompletedTask;
     }
 }