find a solution, just remove undefined determine below

        if (rawLabel === undefined)
              rawLabel = option?.[optionLabelProp || mergedFieldNames.label];
            if (rawKey === undefined) rawKey = option?.key ?? rawValue;

to

     rawLabel = option?.[optionLabelProp || mergedFieldNames.label];
     rawKey = option?.key ?? rawValue;

https://github.com/react-component/select/blob/ec0c6c748a24aa500ede15f1d2aacd0dacf4f63b/src/Select.tsx#L275
https://github.com/react-component/select/blob/ec0c6c748a24aa500ede15f1d2aacd0dacf4f63b/src/Select.tsx#L277

because when component re-render, rawLabel and rawKey not be re-assign value

for controlled components, your usage of the "onChange" method is wrong. It is not a native method. Just pass the value directly, like this:

i fixed the demo

https://github.com/react-component/select/blob/ec0c6c748a24aa500ede15f1d2aacd0dacf4f63b/src/Select.tsx#L289
本质还是internalValue这个值在select选择的时候会被triggerChange改变，当新的选项刷新试就会走到这个逻辑，要不要在这块增加一个逻辑，如果新旧label不匹配，就更新internalValue为新的值呢

@bbb169 思路是可以的，但是最好不要在 convert2LabelValues 里做。convert2LabelValues 最好是个纯函数，不应该加副作用。