diff --git a/SignalMessaging/profiles/ProfileFetcherJob.swift b/SignalMessaging/profiles/ProfileFetcherJob.swift
index cfd2da60d..7d4830e1a 100644
--- a/SignalMessaging/profiles/ProfileFetcherJob.swift
+++ b/SignalMessaging/profiles/ProfileFetcherJob.swift
@@ -162,12 +162,19 @@ public class ProfileFetcherJob: NSObject {
     }
 
     private func updateUnidentifiedAccess(recipientId: String, verifier: Data?, hasUnrestrictedAccess: Bool) {
+        guard let verifier = verifier else {
+            // If there is no verifier, at least one of this user's devices
+            // do not support UD.
+            udManager.setUnidentifiedAccessMode(.disabled, recipientId: recipientId)
+            return
+        }
+
         if hasUnrestrictedAccess {
             udManager.setUnidentifiedAccessMode(.unrestricted, recipientId: recipientId)
             return
         }
 
-        guard let verifier = verifier, let udAccessKey = udManager.rawUDAccessKeyForRecipient(recipientId) else {
+        guard let udAccessKey = udManager.rawUDAccessKeyForRecipient(recipientId) else {
             udManager.setUnidentifiedAccessMode(.disabled, recipientId: recipientId)
             return
         }
diff --git a/SignalServiceKit/src/Messages/OWSMessageSender.m b/SignalServiceKit/src/Messages/OWSMessageSender.m
index 5c5e7d999..efceb602e 100644
--- a/SignalServiceKit/src/Messages/OWSMessageSender.m
+++ b/SignalServiceKit/src/Messages/OWSMessageSender.m
@@ -1036,6 +1036,8 @@ NSString *const OWSMessageSenderRateLimitedException = @"RateLimitedException";
         OWSLogWarn(@"Sending a message with no device messages.");
     }
 
+    OWSLogVerbose(@"Sending message; ud? %d %d.", messageSend.isUDSend, messageSend.unidentifiedAccess != nil);
+
     // NOTE: canFailoverUDAuth is NO because UD-auth and Non-UD-auth requests
     // use different device lists.
     OWSRequestMaker *requestMaker = [[OWSRequestMaker alloc]
@@ -1359,13 +1361,17 @@ NSString *const OWSMessageSenderRateLimitedException = @"RateLimitedException";
     OWSLogDebug(
         @"built message: %@ plainTextData.length: %lu", [messageSend.message class], (unsigned long)plainText.length);
 
-    OWSLogDebug(@"recipient.devices: %@", recipient.devices);
-    [DDLog flushLog];
+    OWSLogVerbose(@"building device messages for: %@ %@ (isLocalNumber: %d, isUDSend: %d)",
+        recipient.recipientId,
+        recipient.devices,
+        messageSend.isLocalNumber,
+        messageSend.isUDSend);
 
     NSMutableArray<NSNumber *> *deviceIds = [recipient.devices mutableCopy];
     OWSAssertDebug(deviceIds);
 
     if (messageSend.isUDSend && messageSend.isLocalNumber) {
+        OWSLogVerbose(@"Adding device message for UD send to local device.");
         OWSAssertDebug(![deviceIds containsObject:@(OWSDevicePrimaryDeviceId)]);
 
         [deviceIds addObject:@(OWSDevicePrimaryDeviceId)];
diff --git a/SignalServiceKit/src/Messages/UD/OWSUDManager.swift b/SignalServiceKit/src/Messages/UD/OWSUDManager.swift
index 9f6678ea5..8718a14e5 100644
--- a/SignalServiceKit/src/Messages/UD/OWSUDManager.swift
+++ b/SignalServiceKit/src/Messages/UD/OWSUDManager.swift
@@ -172,6 +172,12 @@ public class OWSUDManagerImpl: NSObject, OWSUDManager {
 
     @objc
     public func setUnidentifiedAccessMode(_ mode: UnidentifiedAccessMode, recipientId: String) {
+        if let localNumber = tsAccountManager.localNumber() {
+            if recipientId == localNumber {
+                Logger.info("Setting local UD access mode: \(mode.rawValue)")
+            }
+        }
+
         dbConnection.setObject(mode.rawValue as Int, forKey: recipientId, inCollection: kUnidentifiedAccessCollection)
     }