this is why the train module has so many instances:
rebuild vr scene
update: doc1 received sync message
rebuild vr scene
update: doc1 add op train
rebuild vr scene
update: doc1 received sync message
rebuild vr scene
update: doc1 add op train
rebuild vr scene
update: doc1 received sync message
rebuild vr scene
update: doc1 add op train
rebuild vr scene
update: doc1 received sync message
rebuild vr scene
update: doc1 add op train
rebuild vr scene
update: doc1 received sync message
rebuild vr scene
update: doc1 add op train
this is why the train module has so many instances: