Puppetting Cities creates hammer icon bug

[Hawawaa]

I just captured this city and I get a message that this city need to build something. Luckly I can move ahead to my next turn.

Spoiler :

 

[AnthonyG]

Yup, this is something I noted for earlier versions:

http://forums.civfanatics.com/showthread.php?t=487570

 

[Dunkah]

Confirmed.

It seem to stay for several turns. Perhaps until it is out of resistance?

 

[Hawawaa]

Reloading it does go away until you take another city and puppet it.