I’ve found that MeshParts will not render the bloom effect from the Neon material. Oddly, this issue only occurs when the MeshParts are the only neon items in the viewport. Introducing any other part that has the Neon material will cause MeshParts to render their bloom, similarly to the old texture issue.
I’ve noticed that at different camera angles the neon doesn’t display.
Edit: Maybe as you say that’s because it only occurs when meshparts are the only object in view.
I am also experiencing this bug and it looks like it is based on if Neon MeshParts are the only object in sight - if there’s a normal neon part the neon renders as normal.