[BUG] Can't apply artboard to iPad Mockups

[ndizazzo]

I'm trying to apply an artboard to 05 iPad/02/Left/Real Space Grey by selecting Plugins > Angle > Apply Mockup, but the prompt doesn't appear, and nothing seems to happen. My document gets a "modified" indicator, however.

When I drop an iPhone Symbol onto an artboard and try the same process, it works correctly. It also works for the 05 iPad/02/Left/Clay Dark variation.

I've also tried a variety of other symbols with mixed success. The one I need, however, doesn't apply the mockup or show a prompt to select the artboard.

I did notice that this symbol has two Screen nested symbols:

and the ones that work properly only have one:

[Lore-Torfs]

I am experiencing the same issue, particularly with the "05 iPad/04/Right" asset.