When you leave the township, your stylish building that gives additional festival tasks is moved to the warehouse. The building is no longer active and does not bring additional free tasks.
Once you move to another township, do not forget to activate the building again. Additional free festival tasks will be available as before.
To activate a stylish building, do the following:

1. Click on your current building -> then press the UP! button
2. Choose the building you would like to activate