The guard networkOperation == nil else { return } on line 265 is was blocking rapid page navigation (opening a thread and then mashing next-next-next while it's loading). Replacing it with cancelling the in-flight operation and nilling it out restores the old behavior where you could tap forward/back rapidly.

Author: dfsm

App/View Controllers/Posts/PostsPageViewController.swift

@@ -203,7 +203,8 @@ final class PostsPageViewController: ViewController {
         flagRequest?.cancel()
         flagRequest = nil
 
-        guard networkOperation == nil else { return }
+        networkOperation?.cancel()
+        networkOperation = nil
 
         // prevent white flash caused by webview being opaque during refreshes
         if darkMode {