Dependency Parser - "go" + "-ing" errors

[sfillwo]

Sentence: i went hiking [[1, 'nsbj'], [-1, 'root'], [1, 'comp']]

Sentence: i went swimming [[1, 'nsbj'], [-1, 'root'], [1, 'comp']]

Sentence: i went riding [[1, 'nsbj'], [-1, 'root'], [1, 'comp']]

Sentence: i went horseback riding [[1, 'nsbj'], [-1, 'root'], [3, 'com'], [1, 'obj']]

Sentence: i went shopping [[1, 'nsbj'], [-1, 'root'], [1, 'advcl']] this one is fixed if truecasing is applied (I went shopping)

First 3 examples are correct. All above examples should identify the "-ing" verb as "comp" of "went".