Advanced coroutines - applySort is called twice

[dmihailov]

In the list with PLANTS, when filter button is pressed emitting of new live data and sorting is executed more than once.
I added logging to be more clear:

In List.applySort:
println("Name: ${plant.name}, position: $positionForItem")

And in
val plants: LiveData<List> = liveData<List> { ...
println("Plant list: ${System.identityHashCode(plantList)}")

And this is observed in Logcat:

Same is observed when the filter is press again, but log is much bigger as all plants are shown.

How can this be optimized?