In the first photo (all red mesh) the WPO and material behaves normally using opaque blend mode and unlit shading method.
In the second photo I switch to masked blend mode and keep unlit shading method and the WPO completely misbehaves and the mesh flickers with this blackness all over it.
I’ve debugged and found that there is no issues with my logic or the WPO nodes but something specific when using masked materials + WPO for this specific node setup.
The constant node that is set to 8.0 if I set that to 0.0 then the issue resolves but my logic doesn’t do any effect for its purpose. Hopefully the team at epic games can fix this since this occurred only after the new updates recently and was working before.