Retaking cities as Venice does not return them to Puppet status

When I was messing around with Venice and got myself in all kinds of trouble, I found that retaking one of my cities (Genoa) does not reset it to the puppet status it had before, but instead makes it accessible as a full city (i.e. I can control the build queue).

See attached Savegames. Pre is set so that it takes you one turn to take the city using the range unit and the rifleman. Post is after I've executed it myself.

Interesting. Just fired up your "pre" save and it behaved for me the same way you describe. Even when I waited a turn to retake Genoa, the result was the same.