Illustrator Mockup Feature removing embedded assets?

Hi all, got a bit of a gripe with the mockup feature.

For pre-text, I'm very new to Illustrator and am basically learning as I go for a work project, so if this is something basic I apologise in advance!

I've been trying to figure out how to add a label design to a blank bottle, all of which I've worked out with little issue.

For some reason though the brand logo and shadow detailing is being removed/hidden everytime I generate it.

Does anyone have any ideas why this might be happening?

Included below is a couple screencaps of the original label, along with the result after mockup generation.

Original label:

Mockup gen:

The big pink rectangle is where the logo should be.

Any ideas and solutions would be appreciated!