diff --git a/app/src/main/java/eu/kanade/tachiyomi/network/interceptor/CloudflareInterceptor.kt b/app/src/main/java/eu/kanade/tachiyomi/network/interceptor/CloudflareInterceptor.kt
index 6aabb98792..37c8e920d2 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/network/interceptor/CloudflareInterceptor.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/network/interceptor/CloudflareInterceptor.kt
@@ -42,7 +42,7 @@ class CloudflareInterceptor(private val context: Context) : Interceptor {
         // Crashes on some devices. We skip this in some cases since the only impact is slower
         // WebView init in those rare cases.
         // See https://bugs.chromium.org/p/chromium/issues/detail?id=1279562
-        if (Build.VERSION.SDK_INT == Build.VERSION_CODES.S && DeviceUtil.isSamsung) {
+        if (DeviceUtil.isMiui || Build.VERSION.SDK_INT == Build.VERSION_CODES.S && DeviceUtil.isSamsung) {
             return@lazy
         }
 
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt
index e59181bc2e..f4adb3c910 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt
@@ -339,7 +339,7 @@ class MangaController :
 
     private fun updateToolbarTitleAlpha(@FloatRange(from = 0.0, to = 1.0) alpha: Float? = null) {
         // Controller may actually already be destroyed by the time this gets run
-        binding ?: return
+        if (!isAttached) return
 
         val scrolledList = binding.fullRecycler ?: binding.infoRecycler!!
         (activity as? MainActivity)?.binding?.appbar?.titleTextAlpha = when {
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaFullCoverDialog.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaFullCoverDialog.kt
index 207169c473..ac5405bb90 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaFullCoverDialog.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaFullCoverDialog.kt
@@ -33,7 +33,7 @@ class MangaFullCoverDialog : DialogController {
     private var disposable: Disposable? = null
 
     private val mangaController
-        get() = targetController as MangaController
+        get() = targetController as MangaController?
 
     constructor(targetController: MangaController, manga: Manga) : super(bundleOf("mangaId" to manga.id)) {
         this.targetController = targetController
@@ -53,9 +53,9 @@ class MangaFullCoverDialog : DialogController {
             setNavigationOnClickListener { dialog?.dismiss() }
             setOnMenuItemClickListener {
                 when (it.itemId) {
-                    R.id.action_share_cover -> mangaController.shareCover()
-                    R.id.action_save_cover -> mangaController.saveCover()
-                    R.id.action_edit_cover -> mangaController.changeCover()
+                    R.id.action_share_cover -> mangaController?.shareCover()
+                    R.id.action_save_cover -> mangaController?.saveCover()
+                    R.id.action_edit_cover -> mangaController?.changeCover()
                 }
                 true
             }