Overlapping Inconsistency in Grease Pencil on Mesh Object

Question Grease Pencil

Hello, I was trying to render my scene and I noticed that the bear details don't always show when following the camera. I turned on Layer Properties > Data > Passes > Z but that didn't fix the issue. Why do the details not always show? The bottom image doesn't show the details even though with other views of the model you can see them through the box. The details and the box are made in grease pencil while the bear itself is made of mesh objects.

Thanks!

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