<Why parent of fragment is null after pause?> I re...

# stackoverflow

[user]

Why parent of fragment is null after pause?
I return to app after a long time pause in background, it crashing with null point exception when try to cast view.parent as View.
Why fragment don't have parent after pause?
class ToolboxSheetFragment : Fragment(R.layout.fragment_toolbox_sheet) {

private lateinit var behavior: BottomSheetBehavior

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)

behavior = BottomSheetBehavior.from(...