How to copy Material Instance properties (and paste on another instance)?

I am trying to copy the properties of a material instance using the right-click menu “Copy All Properties in Category” but when i do i am unable to paste it on any material (including its own) as it says the properties dont match whats in the clipboard.

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If i paste the clipboard into notepad the properties are indeed invalid. But i have no idea why? Any tips?

(im using unreal 5.4.1 on a Windows 11 machine)

right-click the group/category in the top part of the menu, in the target it will paste onto parameters that share the same name/hierarchy.

you will have to do this across the 1st-layer of properties, so in this pic below I will have to do it wor Water, etc (8x):

You cannot seem to do this at the top-top-level ‘parameter groups’. :cloud_with_rain:

This feels like a bug… as i can copy both the ‘General’ group or properties ‘Previewing’ group of properties at the top level?

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You can copy anything, but paste won’t be available.

Unsure if this is expected or a bug.