This is the behaviour of transparent objects. From my experience, there isn’t much you can do with this visual glitch, but try making the material of the part covering the red part glass.
Such glitches happens sometimes. Try to change the transparency as @chrisNightmareFoxy said, or try to change material to for example plastic or something else.
I have also experienced this problem when using Neon parts set into glass. One will appear neon but the other will look as if it’s made out of smooth plastic.
Some other people are saying this. It’s all about the transparency of the object. I suggest you decrease the transparency of the part. Usually in the game itself, it should do this less often. I’m not 100% sure though. Tell me how it goes and if you have any questions! Good luck!
Hi as I’ve re-read this I’ve noticed it a fairly major issue. I recommend messaging the Lead Top Contributers and requesting this is put into studio bugs. Hopefully this will act as foundations to solving this issue.
Hi you can find multiple references to this problem here;
It also happens when you are using two layers of glass, if you have two separate transparent objects in front of each other and look through the closest one, the furthest disappears. No viable solution has been reached.