April 2020 - last edited April 2020
I recently acquired Angela Button, and sent at least 255 Springfieldans on the "Congregate" job. Now that they have completed the job, they are stuck in a collection loop. I can collect their rewards, but they never are released from the Springfield Elementary where they congregate. If I exit the game and come back, all their rewards are there again to collect. If I get a network error, when I go back, all their rewards are there to collect again. I can't assign them new jobs, and when I try to find them via City Hall, it goes back to Springfield Elementary (but they still don't show). I counted and I have at least 255 assigned to the job. I have collected over $35 million in less than 2 days because I can just keep going back and re-collecting.
I have tried playing on several different machines (both iPad and Android) and it's consistent.
April 2020
To release the characters, store the building, go to friends screen and back to your town, then replace the building.