@Bubble, can you consider modifying the issues list box to add a check box to filter for the current page only error that is open in the designer.
And if possible, also make the height of the dialog extendable
At the moment, you have to scroll through the list and try and find the errors that relate to the page. When doing a lot of cloning of pages for example where multiple things are interlinked, it can get messy and it will help just focus.
Like the mock below;