diff --git a/NucleicRemote/NucleicRemote/Views/Theme.swift b/NucleicRemote/NucleicRemote/Views/Theme.swift
index af0f695..596d822 100644
--- a/NucleicRemote/NucleicRemote/Views/Theme.swift
+++ b/NucleicRemote/NucleicRemote/Views/Theme.swift
@@ -269,6 +269,9 @@ struct EffortMenu: View {
         return levels.contains(effort) ? effort : (levels.last ?? MobileEfforts.fallback)
     }
 
+    /// Once Orchestra is latched on for an existing chat, the ordinary levels can't be chosen.
+    private var locked: Bool { lockWhenOrchestra && orchestraActive }
+
     var body: some View {
         Menu {
             ForEach(levels, id: \.self) { level in
@@ -276,6 +279,7 @@ struct EffortMenu: View {
                     if effort == level { Label(display(level), systemImage: "checkmark") }
                     else { Text(display(level)) }
                 }
+                .disabled(locked)
             }
             Divider()
             Button { effort = sentinel } label: {