Using invoke multiple times for stubbing the same function does not work properly.(同一函数打桩使用多次invoke无法很好工作)

[WFrame0224]

When using the MOCKER in the following way, the expectation is: func1, func1, func2; however, during actual runtime, the second rule for func1 is skipped, and the stubbing effect becomes func1, func2.
下面这种方式MOCKER时，期待：func1,func1,func2;但是实际运行时出现，func1第二次规则会被跳过，打桩效果变为func1,func2

MOCKER(xxx)
    .stubs()
    .will(invoke(func1))
    .then(invoke(func1))
    .then(invoke(func2));