Hello folks, just testing v8, not an active community member
If block instances are set to be tranparent when locked, thet’re only tranparent when looking through other blocks, e.g. things are not visible through it, unless they’re blocks too.
The effect resembles looking through polarized glass or smth.
The workaround may be to hide initial block and explode its copy to get a polysurf (which is predictibly trasparent))