Chopard's happy diamonds not moving

Melora24

scarf lover
Jan 18, 2014
1,676
166
I have a heart-shaped pendant with 3 moving diamonds inside. I haven't worn it for a while (it's about 10 years old).
I took it out yesterday, and noticed the diamonds seem to get stuck where they are. I can make them move, but not easily, which was not the case when I got it.

Do some of you ever had this issue? I live pretty far away from a store, so there will be a while before I can ask them.