@karol-majewski I am trying to reproduce it here https://codesandbox.io/s/react-router-prompt-example-react-router-6-7-forked-j91ukk?file=/src/App.js but it works.
I observed that you have set when to false.
Can you please confirm if that was the issue or anything else you are trying to explain?

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Edit:
Are you trying to use the Component in same page, can you share your use-case?

My apologies for being imprecise. I overlooked the fact that dependencies in my CodeSandbox had no fixed versions.

I suspect you have figured it out, but this is the issue I was getting when using [email protected]:

Yes @karol-majewski you reported it right there and is fixed in v0.5.2
#88 (comment)
Thank you.

Excellent! Thank you 🙇🏻‍♂️