I just watched Courtney on the Limitless Podcast with Matt Beall.

In the comments section, I found this comment:

"He totally ignored when you said 'Jellyfish have no brain, but they have memory.' to challenge what he was saying about not being able to remember much of the physical body wasn't taken up on 'the ships'."

I intuitively came up with the following answer:

Humans would be able to remember better if there was no "psi oppression field" affecting the brain. You don't need the brain to remember, you need the brain to translate memories into language. The oppression field is messing with that.

That's an interesting possibility:

The so called "psi oppression field" is not just there to damp down psi abilities. It's messing with the brain such that ISBE memories won't be translated into the physical parts of brain.

As you see, I'm a proponent of the idea that ISBEs have memory, but I'm also convinced that ISBE memory doesn't work like physical memory. So, how does it work?

ISBE memory is the ability to access past experiences naturally without the need to process physically stored data first. So, it's essentially working like remote viewing. The ISBE doesn't "recollect", but "reconnects".

When the ISBE re-enters the body, that ability of reconnection is damped in the same way the ability of remote viewing and telepathy is damped. You have a short period of time to translate the memory into the physical brain, but you need to be focused on doing that, just like Courtney describes it in the interview.