I personally am very convinced that dpdr generally speaking stems from trauma and/or anxiety. I have also experienced a few recoveries and relapses and after my recovery i could feel normal anxiety and panic just like before dp and dr. It was only after prolonged anxiety and stress i ended up retriggering it again, but i recovered a lot faster the second time. I recently started trauma therapy and my therapist have identified several factors from my youth that might have made me more predisposed towards dpdr. I guess i am trying to say that the trigger does not really matter but it is absolutely a stress/trauma related issue in the vast majority of cases.