2nd mission, on “Defence”, with scripted attack. A small beam turret was under attack (had lost shields and was somewhere in structure) when I right clicked to sell. Sometime later (unsure if it was on completion of the sell timer or before that) the game crashed with:
It could have been that the turret was blown up before sale, but I won’t hold myself to that.
Edit: I’ve changed the topic title, since it’s not removal-related as the original said.