Reset status field in tag as well as func

include/grpcpp/impl/codegen/callback_common.h

@@ -101,6 +101,7 @@ class CallbackWithStatusTag
     CatchingCallback(std::move(func_), std::move(status_));
 
     func_ = nullptr;     // reset to clear this out for sure
+    status_ = Status();  // reset to clear this out for sure
     g_core_codegen_interface->grpc_call_unref(call_);
   }
 };