I’ve got this partially figured out. I think it has something to do with the fact that the plane below the ribbon particle is a transparent material. Therefore, I think this happened because of the Translucency Sort Priority being the same on both the particle and transparent plane below it. Due to other issues, I’ve changed the plane to have a masked material instead of transparent, which also solved this issue.
On another note, I’ve noticed that my ribbon particle is flickering sometimes, and I’m not sure why. I’ll make another thread for this issue soon.