DateTime Input position outside popup border

I think I'm losing my mind...

The modal for the date picker is popping up and disappearing off the edge of the popup. In designer it pops up to the right of the component, in the browser it pops up under.

Browser:

Designer:

First question: why?
Second question: can I add a property to adjust where the modal position is?

Thanks!

edit: Was doing some user acceptance testing and making tightening up the UI and they said that this started happening. They also stated that it didn't do that before, but when it started messing up we don't know.