[BUG]

## Issue Description

Type: *bug report*

### Describe what happened

### Describe what you expected to happen

### How to reproduce it (as minimally and precisely as possible)

1.sentinel1.8.7 在与网关gateway4.1.0 整合的过程中，我在sentinel 控制台上设置了流控管理，但是在后台自定义异常处理时由FlowException，变成了ParamFlowException，不知道为何，有没有人能够解答
2. 引入的pom为springboot3.2.2
3.

### Tell us your environment

### Anything else we need to know?

Start by reproducing the Sentinel 1.8.7 and gateway 4.1.0 integration with Spring Boot 3.2.2, using the Sentinel console flow-control setting and the custom exception handler described. Trace why FlowException becomes ParamFlowException and document the conditions or configuration responsible. Done means the behavior is explained and a focused fix or confirmed usage guidance is provided.

Written by the indexing model from the issue text.