Parts keep dissaperaing

[Be_nUK (be_n)]

I create a part then go to build something else on the map then when I come back the part is invisible but transparency says 0

Does anyone know what is happening?

Update: It only does it with unions

[Der_pified (Derp)]

Please research before posting about a problem:

UnionOperation invisible even though the transparency is set to 0?

What are you attempting to achieve? I am attempting to use UnionOperations to make a door way. What is the issue? The UnionOperation is invisible even though the Transparency is set to 0. [image] In-game: [image] What solutions have you tried so far? I have tried: Deleting the UnionOperation and adding it back (Ctrl-Z) Seperating the UnionOperation (It literally deletes the UnionOperation with no parts found) Relaunching Roblox Studio This issue is happening within every UnionOperat…