Steps to reproduce:

1. Open attached repro project. Or:

** Create a new High Definition 3D project.
* Go to Package Manager > High Definition RP > Samples and import "Materials Sample".

1. Open "Hair" scene.
2. Open "PhysicalHair_Cards" shadergraph.
3. Enter Playmode.

Actual results:* No errors occur.

Expected results: "Objects are trying to be loaded during a domain backup." errors appear in console. Full message in notes below.

Reproducible with versions: 6000.0.0f1, 2023.3.0b6, 2022.3.26f1

Can't test with versions: 2021.3.37f1, Materials sample did not include this shadergraph and I couldn't downgrade or repro successfully.

Tested on (OS): Ubuntu 20.04, MacOS 12.7

Notes:

• Attached .mp4 of this occuring.
• Error message:

 
{code:java}
Objects are trying to be loaded during a domain backup. This is not allowed as it will lead to undefined behaviour!
UnityEditor.Graphing.GraphObject:OnBeforeSerialize ()
{code}