How can I resolve a conflict between two post-process materials outline?

Hello,
I’m using Unreal Engine 5.4 and I’m having an issue with outlines via post-processing.
In my project, I currently have a material that acts as a ‘highlight’ outline which, when you hover the mouse over it, shows where you can interact with the object.
This material works very well and is placed within the post-processing volume material.
The problem is that I’ve created a new outline for the project’s design, which is applied to all the assets in my scene within the project.
I’ve therefore placed it in the same way as the first one, within the Post-Process Volume material, but the problem is that it conflicts with the outline highlight.
As you can see in the images, the outline highlight appears to be cut off by the second one.
I hope to find an answer here.
Thank you.