Okay, I'm not really sure what's going on... But

var show by rememberSaveable { mutableStateOf(false) }

causes

ClassCastException: Boolean can't be cast to String

on configuration change.

remember { ... }

works fine, of course. afaik,

rememberSaveable

uses bundle to save values so it should be fine, no?

Sounds like bug. Do you have the full stack trace?

See this thread: https://kotlinlang.slack.com/archives/CJLTWPH7S/p1642080603414400

Here goes

Chuck already fixed this I believe, should be in a release soon if it's not out already.