I'm sure Dagom Rinpoche has reason to enter clear light in Bangkok.
It is just like how the places Buddha was born (Lumbini), enlightenment (Bodhgaya), where he gave his first teaching(Sarnath), where he died(Kusinara) are important places for every Buddhist to visit as these places has some special power. I remember a lama gave a teaching before that these places if we visit and make lots of offerings, it can prolong one's life.
Dagom Rinpoche is definitely not ordinary, I heard from many reliable sources before that even when DS takes trance in an oracle, DS will always pay respect to Dagom Rinpoche first.
I am looking forward to hear more news on the new incarnation.