Version

2.3.3

Reproduction link

https://jsfiddle.net/06q3ctsp/

Steps to reproduce

Child component's updated event is unexpected triggered when it has content, not when it's content is changed.

What is expected?

Child component's updated event is triggered only when it's content is changed.

What is actually happening?

When parent component is changed, the child component with content will always be updated whether it's content is changed.