My prefered way to deal with mechanoid clusters is to give my best melee colonist a ton of smoke grenades and a good melee weapon and start meleeing all the turrets down.

I tried that just now however using the smokepop belt and the turrets were perfectly able to see me and killed my colonist instantly

Is this a bug? or is it intended? https://cdn.discordapp.com/attachments/264885156114989056/769005495272079391/20201023020740_1.jpg