Animation bug

During the sims welcome event when arriving in a new house, the other sims have an animation issue
They are always doing the same little animation like waiting and moving their head
Since they're doing this again and again, they feel like they are in x2 speed even if I am in x1

I don't have any mods or ccs
I'm playing on PC with the EA app
My sim live in the tree house in Innisgreen