What I have noticed that in many experiences like that there seems to be many cases with element of some sort of specialness / self-significance, or appeal to ego. Like in very this story:
...I was approached yesterday and taken on an astral journey, to the Mantid homeworld. I was approached by the Mantids in the afternoon, and they were talking to me about their involvement with the humans...
...Mantids were quite impressed that I could change from Spider to Mantid and then to Human and back again...
...The Mantids also felt better assured that I am not Reptilian...
I also know a person who had described the dream that's pretty much identical to Wave Chapter 2 experience with Mantis walking around like nothing special and eating children like it was a piece of chicken. (and the person was not familiar with Cassiopaean experience at the time)
It's hard to judge what kind of phenomena going on / being observed, what's going behind the scenes can possibly be different all together

IMHO