LiveData.observe is NOT onChanged.

LiveDataExtensions.kt

package your.awesome.package

fun <T> LiveData<T>.observeOnChanged(owner : LifecycleOwner, observer : Observer<T>) : Unit {
    var prev : T? = null
    this.observe(owner, Observer<T> {
        if (!(prev?.equals(it) ?: false)) {
            observer.onChanged(it)
        }
        prev = it
    })
}