Interface errors Xcode 9 B2

Having some issues on interface builder with nib files. When changing the height of the view in IB, it seems that the view's content height does not adjust with the view it self and things get weird. I see blue lines, outlining the content view and its not within the bounds of the main view - furthure to this, I am then, therefore unable to add any child views to the parent view. Is this a known issue with Xcode 9?

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Replies

How to you change the height : by dragging or setting the value ?

Have you defined (yourself or automatically) constraints in the view ?

Do the blue lines correct themselves if you close and then reopen the xib?