The node/move tool usually show a "procedural" shape's generation settings (as well as fill, stroke, etc.) in the context toolbar, but it doesn't when it is a mask. Only "curves" shapes display properly in the context toolbar when used as a mask.
In the example:
select the node or move tool
select Triangle A and look at the context toolbar, then select Triangle B and look at the context toolbar. There is a lot of missing information, for example "Top point"
But if you select one of the shape tools, it will show these settings properly.
Context Toolbar Shape Bug.afdesign