Spitter attack through gleam sign

[Mayumichi]

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A spitter shot me through a sign?

I was inside one of my hubs, and a spitter came up to the outside of the building where we have a huge sign module window. It then shot at me and although the spitter could not make it through the sign modules its shots did and killed me. Not sure if this is a bug or if signs do not block attacks as I know they don’t block weather.