Towers don't change when ally surrenders

[zillusion]

When an ally surrenders, his cities and mines are randomly assigned to teammates. His defensive towers are not. I don't know that it matters a lot, but that seems asymmetrical.

[SnotlinG]

Hello,

They are supposed to, and I just did a quick test and in my test the Towers changed owner.
Do you have a game where did this not happen?
Did the Towers stay as they were (owned by previous player), or did they turn neutral or get removed from the game?