Hi Peter,
Date formatting is configured per language in an app. Have you checked if you have configured the right formatting for each languages you have? You say it works fine in local app but not in the cloud app. Do you you use the same language settings in cloud app as in your local app? This looks like a language problem to me.
Date format was set correct, Time format was set correct.
Date and time format was empty. (and now also set).
Only one language is set: Dutch Netherlands also set as the default language.
I've created a microflow to empty the complete table, now it works fine.
(Might also bee that old data was shown up).
Thanks for the tips
Kind regards
Peter