Dead Wolf noises

My wife and I play minecraft pe on separate mobile devices. We have a realm. When we walk over certain areas, killed wolf audio noise plays - rather creepy.   These are areas where in the past we have killed wolves - e.g. In the sheep pen.

We have tried closing realm and re opening. I have downloaded a copy of the realm. I can confirm that the issue does not occur playing locally, it only occurs playing on the realm.  I have tried re-loading the download local copy of the map back to the realm but it doesn't resolve the issue. So it seems to be a realm issue considering the local copy of the world is bug free but the same loaded back to the realm has the bug.  Your feedback is much appreciated.