horse's mane the wrong colour during race

[teal lion]

So... no idea if that's connected, but I had an issue with my horses' manes and tails being black instead of white, and white instead of black. This issue fixed itself after I "used" new stables (entered the new horse screen, and clicked from right to left to see all horses one by one). I also checked their equipment screen. Afterwards, the issue stopped happening.
-# Still, it shouldn't be happening in the first place

[uncut cairn]

Mine also sometimes change color for a day