Hi @douzi8,

I have checked your bin and the foo object remains the same as expected.

Interesting, looks like a bug to me.

It is working as expected, bar.car.log gets a new value assigned and foo.car.log is not changed.

Before assignment we have:

foo.car.log => 'benchi'
bar.car.log => 'benchi'

After assignment:

foo.car.log => 'benchi'
bar.car.log => 'baoma'

@ealves-pt but update is still called for foo, which should not be happening.

@simplesmiler hmmm indeed didn't noticed that. Interesting...

Edit: Just noticed that if we use a computed property on both components it works as expected.