fix fallback guide group

CHANGELOG.md

@@ -12,7 +12,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix block scheduler deleting the current hour's playout items, taking the channel offline until the next block
 - Fix playlists and marathons not continuing from the saved position after a restart or a playout rebuild
   - Sequential and scripted schedules first build after upgrading may still start at the wrong item; every build after that will be correct
-- Fix fallback duration and history for sequential and scripted schedules
+- Fix fallback duration, history and guide group for sequential and scripted schedules
 - Fix shuffled playlists and marathons (`shuffle_groups`) playing the wrong content after the first full cycle
 - Fix multiple causes of playout build hangs
 - Fix **Skip Missing Items** being ignored by multi-collection shuffle, shuffle in order, and playlists

ErsatzTV.Core/Scheduling/Engine/SchedulingEngine.cs

@@ -851,6 +851,7 @@ public class SchedulingEngine(
                             playoutItem.FillerKind = FillerKind.Fallback;
 
                             _state.AddedItems.Add(playoutItem);
+                            _state.AdvanceGuideGroup();
 
                             // create history record
                             List<PlayoutHistory> maybeHistory = GetHistoryForItem(

ErsatzTV.Core/Scheduling/YamlScheduling/Handlers/YamlPlayoutDurationHandler.cs

@@ -228,6 +228,7 @@ public class YamlPlayoutDurationHandler(EnumeratorCache enumeratorCache) : YamlP
                             playoutItem.FillerKind = FillerKind.Fallback;
 
                             context.AddedItems.Add(playoutItem);
+                            context.AdvanceGuideGroup();
 
                             // create history record
                             List<PlayoutHistory> maybeHistory = GetHistoryForItem(