diff --git a/Yattee/Services/Navigation/NavigationRouter.swift b/Yattee/Services/Navigation/NavigationRouter.swift
index 6f97a337..299b0bb1 100644
--- a/Yattee/Services/Navigation/NavigationRouter.swift
+++ b/Yattee/Services/Navigation/NavigationRouter.swift
@@ -44,7 +44,15 @@ final class NavigationRouter {
         let key = item.id
         return Binding(
             get: { self.stacks[key] ?? [] },
-            set: { self.stacks[key] = $0 }
+            set: {
+                // Only the selected section's stack is on screen, so only it
+                // edits its path (Back, swipe back). A NavigationSplitView
+                // detail stack that is being replaced on a selection change
+                // writes an empty path on its way out, which would throw
+                // away what the section had pushed.
+                guard key == self.selection.id else { return }
+                self.stacks[key] = $0
+            }
         )
     }
 
diff --git a/YatteeTests/NavigationTests.swift b/YatteeTests/NavigationTests.swift
index 054ae909..5b125655 100644
--- a/YatteeTests/NavigationTests.swift
+++ b/YatteeTests/NavigationTests.swift
@@ -677,6 +677,28 @@ struct NavigationCoordinatorTests {
         #expect(router.selection == .bookmarks)
     }
 
+    @Test("A stack that is no longer selected can't clear itself")
+    func offscreenStackWriteIgnored() {
+        let router = NavigationRouter()
+        router.push(.history)
+        let homePath = router.path(for: .home)
+
+        router.select(.bookmarks)
+        homePath.wrappedValue = []
+
+        #expect(router.stack(for: .home) == [.history])
+    }
+
+    @Test("The selected stack still pops")
+    func selectedStackPops() {
+        let router = NavigationRouter()
+        router.push(.history)
+
+        router.path(for: .home).wrappedValue = []
+
+        #expect(router.stack(for: .home).isEmpty)
+    }
+
     @Test("A destination pushed before startup keeps its section")
     func deepLinkBeforeStartup() {
         let coordinator = NavigationCoordinator()