diff --git a/GeminiProtocol/GeminiDataTask.swift b/GeminiProtocol/GeminiDataTask.swift
index 1442252..2bae8eb 100644
--- a/GeminiProtocol/GeminiDataTask.swift
+++ b/GeminiProtocol/GeminiDataTask.swift
@@ -79,6 +79,7 @@ public class GeminiDataTask {
                 self.completion(.failure(.connectionError(error)))
             } else if let message = context?.protocolMetadata(definition: GeminiProtocol.definition) as? NWProtocolFramer.Message,
                       let header = message.geminiResponseHeader {
+                guard isComplete else { fatalError() }
                 let response = GeminiResponse(header: header, body: data)
                 self.completion(.success(response))
             }
diff --git a/GeminiProtocol/GeminiProtocol.swift b/GeminiProtocol/GeminiProtocol.swift
index b0f80a8..569b71f 100644
--- a/GeminiProtocol/GeminiProtocol.swift
+++ b/GeminiProtocol/GeminiProtocol.swift
@@ -88,12 +88,12 @@ class GeminiProtocol: NWProtocolFramerImplementation {
         let header = GeminiResponseHeader(status: statusCode, meta: meta)
         
         let message = NWProtocolFramer.Message(geminiResponseHeader: header)
-        // What does the return value of deliverInputNoCopy mean, you ask? Why, I have no idea
-        // It always returns true for a length of zero, so following the sample code and looping
-        // infinitely until it returns false causes an infinite loop.
-        // Additionally, calling deliverInput with an empty Data() causes an error inside Network.framework.
-        // So, we just ignore the result since it doesn't seem to cause any problems ¯\_(ツ)_/¯
+        // Deliver all the input (the response body) to the client without copying.
         _ = framer.deliverInputNoCopy(length: statusCode.isSuccess ? .max : 0, message: message, isComplete: true)
+        // Just in case, set the framer to pass-through input so it never invokes this method again.
+        // todo: this should work according to an apple engineer, but the request seems to hang forever on a real device
+        // sometimes works fine when stepping through w/ debugger => race condition?
+//        framer.passThroughInput()
         return 0
     }