When selected the instance is the one in the Godley table it is not shown on the canvas. This is because the view zooms in to the lower left corner of the Godley table and positions it in the upper left corner, which leave the Stock Variables row out of the visible area.
Simple solution would be to zoom in on the upper left corner of Godley table which would cover more cases where the Godley table is small enough to be completely visible.
Anonymous
Good idea! Currently the bookmark is centred around the variable's location, which doesn't make much sense for invisible variables such as Godley stock variables.