Version

3.0.4

Reproduction link

https://jsfiddle.net/frikeldon/dqrpan9m/1/

Steps to reproduce

Press button with label "Toggle"

What is expected?

Must to appear an element with the "Hello world!" text

What is actually happening?

An exception appear in console

I'm trying to make a wrapper component for make child components work together

same as #2715 and closed by #2717 It's not release yet.