Up to this point, I’ve managed to bypass all bugs by clever use of the Google and the Console. But now I’m helpless, since one of my main challenges is to forget about manual saving.
The horse keeps wandering off, starting to walk away as soon as I dismount. The ‘Waiting’ option simply makes it disappear and respawn at the Whiterun stable. I’ve already realised that purchasing another horse is not a viable solution, since the bug seems to be contagious.
Despite the time and effort lost, I should be sincere with myself now: The appeal of challenge is to provoke situations like this. Instead of complaining, I’ll try to find a solution tomorrow.