This is also true just walking around in my hometown in Norway during the summer holidays.
Welcome to middle Norway where we have autumn all year round. It’s now rain and 17 degrees Celsius.
What worked for me was deleting and reinstalling the app.
She was bald for a good while, and then just showed up for work one day with her hair grown back and no explanation. Didn’t have to rebuild cache, but I’m gonna do it anyways the next time I play.