In 5.19 confirmation popup is not blocking anymore, while in previous versions it is. Is this a design decision or a bug, I cannot find in the release notes. Is there some way to make these popups blocking again in 5.19 (or some newer version)?
I think this bug is fixed in Mendix 6.2.0 according to the release notes:
Confirmation dialogs are modal once again. (Ticket 463453)