I can see why you thought that, but the insulating barely paper is actually there...it's just red like the cells.Hummina Shadeeba said:your other pics weren't showing and all i saw was this which looks like none. maybe theyre there but doesnt look like it. maybe i imagine too many possibilities that arent there.
Here is another photo of the same thing from a different angle:

And here is a different area of the same pack that shows them more clearly:

That pack was made back in 2017 when I was first starting out, so I wouldn't be surprised if there was a few lessons learned, but missing cell insulators is not one of them.
Hope that clears it up.
Cheers