[nogridbag]

>>The reactivity system will only track changes under certain conditions. Don’t expect to throw anything you wish at it

>This is the one part I hate about vue.

Haven't used Vue for a while, but if I recall correctly it will only track changes on keys defined in the original data object. Is that what you and the parent are referring to?

[Too]

Angular has similar problems, it is dangerous to replace an array rather than replace the elements of an array for example.

Don't know how vue compares with this but for angular beginners this is a very common mistake.