Root motion from montages does not get mirrored correctly

MontageInstance->MontageSync_PostUpdate();
if(RootMotionParams != nullptr && !AnimInstanceProxy->Sync.GetUngroupedActivePlayersRead().IsEmpty())
{
   FAnimTickRecord TickRecord = AnimInstanceProxy->Sync.GetUngroupedActivePlayersRead()[0];
   if (TickRecord.MirrorDataTable)
   {
      FTransform InTransform = RootMotionParams->GetRootMotionTransform();
      if (bUsingBlendedRootMotion && !RootMotionBlendQueue.IsEmpty())
      {
         InTransform = RootMotionBlendQueue.Last().Transform;
      }
      FVector T = InTransform.GetTranslation();
      T = FAnimationRuntime::MirrorVector(T, TickRecord.MirrorDataTable->MirrorAxis);
      FQuat Q = InTransform.GetRotation();
      Q = FAnimationRuntime::MirrorQuat(Q, TickRecord.MirrorDataTable->MirrorAxis);
      FVector S = InTransform.GetScale3D();
      FTransform MirroredTransform = FTransform(Q, T, S);
      if (bUsingBlendedRootMotion && !RootMotionBlendQueue.IsEmpty())
      {
         // Defer blending in our root motion until after we get our slot weight updated
         FQueuedRootMotionBlend& LastQueuedRootMotionBlend = RootMotionBlendQueue.Last();
         LastQueuedRootMotionBlend.Transform = MirroredTransform;
      }
      else
      {
         RootMotionParams->Set(MirroredTransform);
      }
   }
}