EDIT: This is a Fix Idea.

Does your Horse run away for no reason? Does this frustrate you when you need it the most?

Bethesda - Create a [Horse Whistle] item that can be purchased from a Stable vendor, and equipped for use to call a players owned Horse if it's out of sight and relatively nearby. Treat it like any equippable item, and let the player put it in their favourites list for quick selection if they want.

If your owned Horse strays from you within a 1 kilometre / 0.6 mile radius, blow the whistle and it will run back to you.

There you go guys, just my contribution of something that would be nice to add to the game.

Thanks for reading.

Oh man, I though this was an actual fix.

that'd be useful. like the one in TLOZ Twilight Princess

Sorry about that, I see your point. I'm just hoping the problem can be addressed, and typed the title wrong as I'm massively tired.