Our app is a secure enterprise portal (business email, files, chat) for MDM-managed corporate devices. Preventing selected text from leaving the app is a hard product requirement, so we opt out of Writing Tools everywhere. On iOS 27.2, the Siri AI entry still appears in the text-selection edit menu (the bubble menu shown on long-press/selection), in both WKWebView and UITextView, and it allows sending the selected text to Siri. We have exhausted every public API and documented all of it: writingToolsBehavior = .none is set and verified at runtime. WKWebViewConfiguration.writingToolsBehavior == .none (-1) before the web view is created, and the web view's internal content view also reports -1. UITextView.writingToolsBehavior = .none as well. The documentation for UIWritingToolsBehavior.none says "Writing Tools will ignore this view", so we expected no AI entry point for selections in these views. The entry is not in UIMenuBuilder. We dumped the entire menu tree in buildMenu(with:) (root and all children, before and after calling super): only standard-edit / open / format / learn / speech / share are present. There is no Siri-related menu or command to remove. The entry does not go through canPerformAction(_:withSender:). We log every selector that is queried; no Siri/WritingTools-related selector ever appears. Our override returns false for everything except cut/copy/paste/select/ selectAll/delete — yet the Siri AI entry is still shown. Even a fully custom menu does not help. Returning a UIMenu built from scratch (only our own UIActions, ignoring suggestedActions) from textView(_:editMenuForTextIn:suggestedActions:) still gets the Siri AI entry attached to the presented edit menu. So the entry is attached to the edit-menu container itself, not to the menu contents. Questions: Is there any supported API on iOS 27 for an app to suppress the Siri AI entry in the edit menu for specific views (or app-wide)? If not, is this intended behavior? It appears to contradict the documented contract of UIWritingToolsBehavior.none ("Writing Tools will ignore this view"). Is there a recommended approach for apps handling confidential data (banking/меdical/enterprise) other than the MDM allowWritingTools restriction? Environment: iOS 27.2 (Iphone 16Pro), Xcode 27.2, deployment target iOS 13.