I came across something very strange, i had a foal called Jackpearl it was a 3+ trait male ebony black horse, after grooming it and walking away it vanished out of my sight i tried to look for it everywhere, i wrote a ticket and the next day i got a dm to help me because i expected the horse to glitched under the map or something.
I use granger and granger informed me that it was still alive and growing up, with the help of the dm i found the horse it was nearby in my Fence, but it had a diffrent colour which is why i did not recognize it.
Somehow it was grey i have over 100 horses about 3 of them including this one are grey i usually kill them or sort them out as soon as they are old enough because i don't like the colour, I clearly remeber the Horse beeing ebony black and granger also says the same.
https://imgur.com/a/6k5jfjn