After taming a wolf, when you leave your world and come back, then the wolf will be in sitting position and will not stand if you right click/tap. Unfortunately I could not get a video of this since the file would always be at least 12 mb no matter how short the video (I dont know why, it may be because of the quality, which is 1080p HD). Although, I have tested it 3 times, and I am sure it is a bug.