Hi! I don't know if its a known issue but I experienced some strange behavior with the date selector when using the DateTimeParameter, selecting any date between april and october froze the UI for one minute then it selected some later date (25 october for 2020, 31 october for 2021 for example, for the ones I tested)
Seems like a timezone conflict, Prefect Cloud detected my time zone as Paris, I changed to local it's working for now 🙂