This happens when I am adding e.g. a RG-series relationship to a RG where the series entity does not yet exist. Since the last update, the "Add a new series" pop-up is no longer displayed on top of the "Add relationship" pop-up, but below it.

Although the UI is still functional, this makes it unnecessarily hard to fill in the fields. Also the pop-up is now much larger than it needs to be (even taller than the viewport height).