The Sims 4’s new High School Years expansion launched Thursday, but the base game update from earlier in the week had some unintentional side effects: It’s making some Sims age up way too fast, while other Sims are becoming attracted to family members.

A representative for The Sims 4 acknowledged the auto-aging Sims bugs in a tweet on the official Sims Twitter account. “We are currently investigating instances involving Sims auto-aging up in saves using the Short or Long lifespan,” EA said via The Sims account. “We recommend temporarily playing in or creating new saves with the default/’normal’ lifespan, as we work towards a solution.”