限流后fallbackFactory类无法进入

`用sentinel能够正常限流，但是fallbackFactory指定类却无法进入。全局拦截限流异常能够正常拦截到`。具体接口如下：
下面的全局能够拦截到异常。

这sh是为什么呢？哪里没配好吗？跟踪代码，发现注入feign的对象也没问题。谢谢！
下面的invoke方法没有执行


Start by reproducing the Sentinel rate-limiting case described in the issue and tracing the Feign fallbackFactory path to the referenced invoke method. Compare it with the global interceptor path, which does receive the exception; done means the cause of the missing fallback invocation is identified and confirmed with a reproducible test or configuration.

Written by the indexing model from the issue text.