Attempt fix #401

compose-persist/src/main/kotlin/it/vfsfitvnm/compose/persist/PersistMapCleanup.kt

@@ -0,0 +1,19 @@
+package it.vfsfitvnm.compose.persist
+
+import android.app.Activity
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.ui.platform.LocalContext
+
+@Composable
+fun PersistMapCleanup(tagPrefix: String) {
+    val context = LocalContext.current
+
+    DisposableEffect(context) {
+        onDispose {
+            if (context.findOwner<Activity>()?.isChangingConfigurations == false) {
+                context.persistMap?.keys?.removeAll { it.startsWith(tagPrefix) }
+            }
+        }
+    }
+}