When in spectator mode, then in creative, tamed wolves disappear?

I tested something out, and I noticed that when I was in spectator mode, then creative, my wolves disappeared. What is funny is that you still hear them. It seems to be fixed by relogging, but I want to see them without relogging. Not tested in multiplayer.
(in the images, I pressed f1.) What is funny is that, when in a structure, 3/4 wolves disappear.