[SOLVED] CI4 have cache Request or not?

I have a question:
CI4 have Cache Request?  Or which application has Cache?

Here is an example of the question above:
- Setted route = get, post
- Form action = post, data is not posted, then I change action = get and submit, then continue to change action = post, the data is posted normally (is there a Cache Request or not?)

Thanks for help

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Normal use route get
- after add route post and CI4 still think is get.
If no change, CI4 still think is get
That is problem? Any cache here...

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