--- a/dom/media/MediaDecoderStateMachine.cpp
+++ b/dom/media/MediaDecoderStateMachine.cpp
@@ -405,16 +405,17 @@ public:
   {
     if (mMaster->IsPlaying()) {
       mMaster->StopPlayback();
     }
 
     // Calculate the position to seek to when exiting dormant.
     auto t = mMaster->mMediaSink->IsStarted()
       ? mMaster->GetClock() : mMaster->GetMediaTime();
+    Reader()->AdjustByLooping(t);
     mPendingSeek.mTarget.emplace(t, SeekTarget::Accurate);
     // SeekJob asserts |mTarget.IsValid() == !mPromise.IsEmpty()| so we
     // need to create the promise even it is not used at all.
     // The promise may be used when coming out of DormantState into
     // SeekingState.
     RefPtr<MediaDecoder::SeekPromise> x =
       mPendingSeek.mPromise.Ensure(__func__);