[2021] When copying multiple harbour buildings only the grid appears, unlit

Hey @Nicholas_Steel, thanks for getting through to us and bringing this matter to our attention.

Before we're able to forward it over, may I kindly check the following:

1. Does this appear in every single game, each and every time? Or is this something that only occurs at a certain instances?
2. Did you notice if the issue started happening since latest update?
3. Is there any possibility you could provide us with a save file where this issue is present? By default, it tends to be located in %userprofile%\Documents\Anno 1800\accounts. Once found, if you could use any file sharing website, upload it and then share the link here with us, this will be extremely useful for reproduction purposes

Looking forward to hearing from you and wish you a very Happy New Year!