diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
index e75917053..e3e4a4b14 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
@@ -173,6 +173,7 @@ class ReadBookActivity : BaseReadBookActivity(),
     private var pageChanged = false
     private var reloadContent = false
     private val autoPageRenderer by lazy { SyncedRenderer { doAutoPage(it) } }
+    private var autoPageScrollOffset = 0.0
 
     //恢复跳转前进度对话框的交互结果
     private var confirmRestoreProcess: Boolean? = null
@@ -969,6 +970,7 @@ class ReadBookActivity : BaseReadBookActivity(),
     }
 
     private fun autoPagePlus() {
+        autoPageScrollOffset = 0.0
         autoPageRenderer.start()
     }
 
@@ -981,7 +983,12 @@ class ReadBookActivity : BaseReadBookActivity(),
         }
         val readTime = ReadBookConfig.autoReadSpeed * 1000.0
         val height = binding.readView.height
-        val scrollOffset = (height / readTime * frameTime).toInt().coerceAtLeast(1)
+        autoPageScrollOffset += height / readTime * frameTime
+        if (autoPageScrollOffset < 1) {
+            return
+        }
+        val scrollOffset = autoPageScrollOffset.toInt()
+        autoPageScrollOffset -= scrollOffset
         if (binding.readView.isScroll) {
             binding.readView.curPage.scroll(-scrollOffset)
         } else {
diff --git a/app/src/main/java/io/legado/app/ui/config/BackupConfigFragment.kt b/app/src/main/java/io/legado/app/ui/config/BackupConfigFragment.kt
index 5ef65682e..e65571c5f 100644
--- a/app/src/main/java/io/legado/app/ui/config/BackupConfigFragment.kt
+++ b/app/src/main/java/io/legado/app/ui/config/BackupConfigFragment.kt
@@ -324,7 +324,7 @@ class BackupConfigFragment : PreferenceFragment(),
                 }.onError {
                     AppLog.put("备份出错\n${it.localizedMessage}", it)
                     appCtx.toastOnUi(appCtx.getString(R.string.backup_fail, it.localizedMessage))
-                }.onFinally(Main) {
+                }.onFinally {
                     waitDialog.dismiss()
                 }
             }
@@ -342,6 +342,9 @@ class BackupConfigFragment : PreferenceFragment(),
             showRestoreDialog(requireContext())
         }.onError {
             AppLog.put("恢复备份出错WebDavError\n${it.localizedMessage}", it)
+            if (context == null) {
+                return@onError
+            }
             alert {
                 setTitle(R.string.restore)
                 setMessage("WebDavError\n${it.localizedMessage}\n将从本地备份恢复。")
@@ -350,7 +353,7 @@ class BackupConfigFragment : PreferenceFragment(),
                 }
                 cancelButton()
             }
-        }.onFinally(Main) {
+        }.onFinally {
             waitDialog.dismiss()
         }
     }
@@ -387,7 +390,7 @@ class BackupConfigFragment : PreferenceFragment(),
         }.onError {
             AppLog.put("WebDav恢复出错\n${it.localizedMessage}", it)
             appCtx.toastOnUi("WebDav恢复出错\n${it.localizedMessage}")
-        }.onFinally(Main) {
+        }.onFinally {
             waitDialog.dismiss()
         }
         waitDialog.setOnCancelListener {