Add Polygon problem

[flyby]

ok we all know what the "Add Polygon" ICE Node does. But I found in the documentation (here) this interesting line:

You can use an array of indices with a per-object or per-element context.

However, as soon as i channel the exact same data, but in a per Point, per Edge or per Polygon context into the Add Polygon node, it stops working. It stops doing anything at all, no new polygons are being created.

Anyone here knows anything about this? What am I doing wrong? Currently I'm using a repeat node to create tons of polygons , would be nice to use contexts instead for some parallelism.