[Bug] Inconsistent results when executing equivalent queries

### Bug Type (问题类型)

gremlin (结果不合预期)

### Before submit

- [x] 我已经确认现有的 [Issues](https://github.com/apache/hugegraph/issues) 与 [FAQ](https://hugegraph.apache.org/docs/guides/faq/) 中没有相同 / 重复问题 (I have confirmed and searched that there are no similar problems in the historical issue and documents)

### Environment (环境信息)

HugeGraph 1.0

### Expected & Actual behavior (期望与实际表现)

Two equivalent queries output differently. The only difference is `as('x')`.

```
g.V().emit(__.loops().is(gte(1))).repeat(__.bothE().otherV()).times(2).as('x').emit(__.loops().is(gte(1))).repeat(__.inE().outV()).times(2).bothE().dedup().by(__.path()).otherV().count()
```

```
g.V().emit(__.loops().is(gte(1))).repeat(__.bothE().otherV()).times(2).emit(__.loops().is(gte(1))).repeat(__.inE().outV()).times(2).bothE().dedup().by(__.path()).otherV().count()
```

### Vertex/Edge example (问题点 / 边数据举例)

_No response_

### Schema [VertexLabel, EdgeLabel, IndexLabel] (元数据结构)

_No response_