I think this is a bug but want to confirm: I have a

savedInstanceState

inside a "view pager" page, and when I go to another page then come back I got an

Key -751342538 was already registered. Please call unregister before registering again

at androidx.ui.savedinstancestate.UiSavedStateRegistryImpl.registerProvider

cc @Andrey Kulikov

hey! could you please show the code of your view pager? it is a bug, I recently reproduced a similar issue and hope to fix it soon

Turns out the minimal example I am able to reproduce it is when the state is created inside a AdapterList. if the savedInstanceState is move out then it doesn't crash. In my case, I don't really need to declear it inside a AdapterList item --- it is an header with some state

Thanks, I will try to fix it