After upgrade to 3.1, all my controls inside Popups are streched to fill the whole popup. The ones inside GridContainer seems to be nearly where they were before, but any control directly as Popup's child get stretched to Popup's size.
I have manually moved/scaled them back to where they should be in the editor, but when the app is run, they again fill the whole Popup.
Is there some known change that is causing this?