Fix a split view mode on iPad (#24705)

Author: kean

RELEASE-NOTES.txt

@@ -2,6 +2,7 @@
 -----
 * [*] New Stats: Add support for "weeks" granularity [#24767]
 * [*] New Stats: Fix dark mode support in custom range picker [#24770]
+* [*] Fix Split View mode on iPad on some scenarios in portrait mode [#24705]
 
 26.1
 -----

WordPress/Classes/System/Root View/SplitViewRootPresenter.swift

@@ -79,12 +79,7 @@ final class SplitViewRootPresenter: RootViewPresenter {
             splitVC.preferredSupplementaryColumnWidth = UISplitViewController.automaticDimension
         }
 
-        switch selection {
-        case .notifications:
-            splitVC.preferredSplitBehavior = .tile
-        default:
-            splitVC.preferredSplitBehavior = .displace
-        }
+        splitVC.preferredSplitBehavior = selection == .notifications ? .tile : .automatic
 
         let content: SplitViewDisplayable
         switch selection {