mmhhh you want two opposite options.
If you activate the remember option you can not deactivate it when you restart the chat.
All informations are stored in the browser cache so you'd need to remove them from storage.
you can try to use a script look like this:
localStorage.clear();
sessionStorage.clear();
document.location.reload();
it would do a clear first to restart the chat.
I've quicly tested here -->
https://typebot.co/test-for-drippingfist and i think that it work but i'm not an expert how @Baptiste or others guru so please take care and test it first to apply.
Thnak you