Factorio Forums

I do not think that anyone has posted this bug already, but when a construction robot replaces a destroyed turret the replacement cannot be damaged - see the picture.
I have tested this on a number of buildings and it is only true for turrets - this includes vanilla laser turrets and gun turrets, but also mod turrets such as the Big Gun and Gatling turret from Yuoki's mod.

I can confirm this but many things can still destroy the rebuilt turrets. From my testing turrets built by hand are not affected. Rebuilt turrets are immune to the combat shotgun, grenades, and explosive rockets targeted at the turret. Rebuilt turrets are vulnerable to biters, and targeted SMG fire. Rebuilt turrets can be walked through when normally placed turrets can't so it's probably some collision box issue. Rebuilt turrets are fixed when loading them from a save.

Thank you for the report, it is fixed for the upcoming 0.11 release now.