Parts still appear even if transparent

I was building sound regions for my game, and I had turned them transparent so that players won’t see the parts when I release the final product. The studio seems to work out that they are transparent and won’t let them see you, but when you actually play the game, you can still see it. They are still visible even if all of them are set to 1 Transparency.

The studio seems to work out that they are transparent and won’t let them see you, but when you actually play the game, you can still see it. What can I do to make them fully transparent?

Studio View:
robloxapp-20220117-1156573.wmv (935.1 KB)

Player/Playing View:
robloxapp-20220117-1157092.wmv (2.9 MB)