Confused with retirement

Product: The Sims Mobile
Platform:Apple iPad
List the specific devices you play with (e.g. iPhone 6s Plus, Samsung Galaxy S7) iPad
OS Version iOS11.3
Player ID: (Find your Player ID in Sims Mobile: https://help.ea.com/help/the-sims/the-sims-mobile/find-your-player-id-in-the-sims-mobile ) 1003009013795
How often does the bug occur? Every time (100%)
Steps: How can we find the bug ourselves? Don’t know.
What do you expect to see? Better understanding of retirement.
Connection Type Wifi
Please select your region Europe
Country UK
Additional feedback

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My retired Sim has gone. He had a blue birthday cake thought bubble and then a message came up he was leaving the game but I had an heirloom. Before he was moving about the house with a pink thought bubble with a family logo. 

I thought Sims stayed around town? Very confused!