Blend modes do not behave the same way across different documents
Hi all!
In one Illustrator document, I have a group of several elements.
One element, a black-and-white texture image (placed as a linked file), uses the Screen blend mode and is placed on top of a group of blue lines.
It looks like this:

All is fine and well, until I want to copy this group of elements to another opened Illustrator document. Then it suddenly looks like this:

Obviously this is not what I want.
I've tried copying the group back and forth between the two documents. It consistently behaves correctly in the first document, but gets messed up in the second document.
So I'm suspecting there is some setting in the second document that messes this up... but what?
Some other info:
- I work in Adobe Illustrator CC 2020 - 24.0.1 (64-bit).
- The documents are both set in RGB mode.
- I've tried resetting preferences, this did not work.
- Absolutely no changes are made to the elements before or after copying and pasting them.
Does anyone know or have a guess as to what causes this strange behaviour?
Cheers,
Astrid
