Thank you! I am quite bored of default tiles myself!
I know that bug, it is indeed rather rare, it happen when loading the game near a hostile mob too. The game initially was supposed to allow you to save only in your home or at designated save points. But since the play area is rather small still, I allowed people to save anywhere. This is only temporary though. When the play area expands, the save point feature will be fully implemented and this bug wont happen anymore on loading the game as there wont be any mobs near save points.
Also, the loading screen can be disabled in the game so for those that this continues to be an issue for can fix it that way, in the case of it freezing from entering the map near a mob.
I'll also consider moving that Wolf spawn a bit to make this less likely to happen.