fix motion graphics loop when seeking

CHANGELOG.md

@@ -71,6 +71,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   - This fix applies to all libraries (local and media server)
 - Fix (3 year old) bug removing tags from local libraries when they are removed from NFO files (all content types)
   - New scans will properly remove old tags; NFO files may need to be touched to force updating during a scan
+- Fix bug where looping motion graphics wouldn't be displayed when seeking into second half of content
 
 ### Changed
 - Use smaller batch size for search index updates (100, down from 1000)

ErsatzTV.Infrastructure/Streaming/Graphics/Motion/MotionElement.cs

@@ -63,7 +63,7 @@ public class MotionElement(
             ProbeResult probeResult = await ProbeMotionElement(context.FrameSize);
             var overlayDuration = motionElement.EndBehavior switch
             {
-                MotionEndBehavior.Loop => context.Duration,
+                MotionEndBehavior.Loop => context.Seek + context.Duration,
                 MotionEndBehavior.Hold => probeResult.Duration + holdDuration,
                 _ => probeResult.Duration
             };