Occasionally, I come across a horse shoe that looks like this. For whatever reason, this horse kicks it’s stall wall and warps his hind shoe in the toe. It seems that it would make the horse lame, but surprisingly, I don’t know that I have ever seen lameness in the few situations where this happens.
It does of course, cause the shoe to come loose prematurely. Because of this loose shoe, it also often damages the hoof wall, especially if not noticed right away.
Pretty much all I can do is suggest keeping the horse on a quicker than normal rotation. Hopefully, this way the shoe doesn’t get the chance to become so warped and obviously the shoe won’t be so loose.