diff --git a/build/Version.props b/build/Version.props
index f859f3720cb..d6c8e492e34 100644
--- a/build/Version.props
+++ b/build/Version.props
@@ -3,7 +3,7 @@
   <!-- Integration tests will ensure they match across the board -->
   <Import Project="ControlPanelVersion.props" />
   <PropertyGroup>
-    <TgsCoreVersion>4.15.2</TgsCoreVersion>
+    <TgsCoreVersion>4.15.3</TgsCoreVersion>
     <TgsConfigVersion>4.0.0</TgsConfigVersion>
     <TgsApiVersion>9.3.0</TgsApiVersion>
     <TgsApiLibraryVersion>9.3.0</TgsApiLibraryVersion>
diff --git a/src/Tgstation.Server.Host/Components/Chat/ChatManager.cs b/src/Tgstation.Server.Host/Components/Chat/ChatManager.cs
index 3e2851e5c40..b5f105ea3e1 100644
--- a/src/Tgstation.Server.Host/Components/Chat/ChatManager.cs
+++ b/src/Tgstation.Server.Host/Components/Chat/ChatManager.cs
@@ -593,16 +593,20 @@ async Task ProcessMessage(IProvider provider, Message message, CancellationToken
 			}
 
 			// map the channel if it's private and we haven't seen it
+			var providerChannelId = message.User.Channel.RealId;
 			KeyValuePair<ulong, ChannelMapping>? mappedChannel;
 			long providerId;
 			lock (providers)
 			{
+				// important, otherwise we could end up processing during shutdown
+				cancellationToken.ThrowIfCancellationRequested();
+
 				providerId = providers
 					.Where(x => x.Value == provider)
 					.Select(x => x.Key)
 					.First();
 				mappedChannel = mappedChannels
-					.Where(x => x.Value.ProviderId == providerId && x.Value.ProviderChannelId == message.User.Channel.RealId)
+					.Where(x => x.Value.ProviderId == providerId && x.Value.ProviderChannelId == providerChannelId)
 					.FirstOrDefault();
 			}
 
@@ -648,7 +652,8 @@ await SendMessage(
 					return;
 				}
 
-				var mapping = mappedChannel.Value.Value;
+				var mappingNonNullableKvp = mappedChannel.Value;
+				var mapping = mappingNonNullableKvp.Value;
 
 				message.User.Channel.Id = mapping.Channel.Id;
 				message.User.Channel.Tag = mapping.Channel.Tag;
diff --git a/src/Tgstation.Server.Host/Components/Repository/Repository.cs b/src/Tgstation.Server.Host/Components/Repository/Repository.cs
index 55603a08d44..0ebddb26409 100644
--- a/src/Tgstation.Server.Host/Components/Repository/Repository.cs
+++ b/src/Tgstation.Server.Host/Components/Repository/Repository.cs
@@ -1020,7 +1020,7 @@ await Task.WhenAll(
 		CheckoutProgressHandler CheckoutProgressHandler(JobProgressReporter progressReporter, string stage) => (a, completedSteps, totalSteps) =>
 		{
 			int? percentage;
-			if (totalSteps > completedSteps || totalSteps == 0)
+			if (totalSteps < completedSteps || totalSteps == 0)
 				percentage = null;
 			else
 			{
@@ -1053,7 +1053,7 @@ TransferProgressHandler TransferProgressHandler(JobProgressReporter progressRepo
 			float? percentage;
 			var totalObjectsToProcess = transferProgress.TotalObjects * 2;
 			var processedObjects = transferProgress.IndexedObjects + transferProgress.ReceivedObjects;
-			if (totalObjectsToProcess > processedObjects || totalObjectsToProcess == 0)
+			if (totalObjectsToProcess < processedObjects || totalObjectsToProcess == 0)
 				percentage = null;
 			else
 			{