Okay, then this is “expected”. We made a decision early on that when a Popup is rendered even partially off-screen that any interaction with the Popup MUST be a drag even, lest a user open a Popup which was not draggable but where the
X is rendered off-screen. If we had not done this, then Popups opened as I described could not be closed.
This behavior has had several unforeseen consequences (like being unable to interact with inputs in such a Popup in any intended capacity), and so we have a ticket open to examine whether we should leave users in that situation to fix the issue on their own, but no ETA on when a decision will be made.
To work around this, you could make sure that your Popup does not open off-screen.