Current Trijang Rinpoche is definitely associated with the Dorje Shugden groups and people although staying low key about it as to not attract too much of Tibetan Govt's attention. Tibet Govt being autocratic does not tolerate anyone who do not follow their policies fair or unfair.
A few months back a celebration of the anniversary of a Temple built by Guru Deva Rinpoche was held in Mongolia. The oracle of Shugden, Tulkus, Geshes, monks flew in to attend. Guru Deva Rinpoche had a huge fallout with the Tibetan Govt decades ago regarding the Shugden issue. Guru Deva is a very big sponsor and supporter of Trijang Rinpoche during his lifetime.
Trijang Rinpoche flew in to grace the celebrations with fellow Shugden practitioners in Mongolia. It was very successful and moving.