The weirdest ego-death experience for me was on a combination of acid and 2C-E.
... Somewhere along this trip I lost myself. It was sort of comparable to like how you can't remember the exact moment you fall asleep. When I think back, I remember being on a certain point on this route, and then a flash forward to another part on this route. What happend in between is gone, what happend after that is mostly gone as wel. ....
I keep referring to the amnesia state, more particularly to the magical state just before and just after amnesia (whiteout, or blackout).
As you mention above there are gaps in consciousness in your experience.
Dreams are remembered particularly well as we emerge from the "blackout" of sleep.
Occasionally during deliriant sessions (atropine, belladonna, nightshade...) the person sleepwalks in a world that is different but not too far from this world, and intermittently emerges and returns to the delirious state, which is a lot like sleepwalking.
Users of Salvia are familiar with the
salvia scale of effects which ends with amnesia, nothing can be achieved beyond this state which is directly related to dosage. Just before amnesia is immaterial, in which the body is no longer consistent (you may become the couch you are sitting upon etc). Deliriants and extremely high dosages of psychedelics put you at the interface of immaterial and amnesia. This is all about dosage.
the term "ego-loss" and the term "breakthrough" relate quite a bit to the immaterial state in which body sensation is very much obliterated and transformed.
On the other hand "ego-loss" may specifically mean some particular philosophic experience though I have seen little consensus about what is ego, except we are universally inspired to dislike big ones like Donald Trump.
"Ego-loss" is compromised in translation and frequently converted into a materialistic consumable experience, typically a milestone for stoners, and generally termed breakthrough, and the salvia scale definition of "immaterial" describes it quite well.