Hi,
Some updates went into the codebase over the weekend.
New license expiry for city assets. The city mayors will only grant you a license to any city asset for 7 days. After which it will drop if you have not auctioned it before hand.
You will then not be able to re-own the asset for a further 7 days (so 15 days after picking up and 7 days after it dropping again).
City assets will be dropping or being auctioned almost everyday for 1 month. So get online to try and claim yours.
Good luck