So, this bug is back again. The horses still have their armor showing in their inventory but it does not appear on them in the overworld.
this is as of 1.21.23
This is happening for me too. I bred 2 horses (that I've had for a while) with 14 hearts each this morning that resulted in an offspring with 15 hearts. I logged out for a minute to fix a visual glitch with an item and now the parents are showing at 12 and 13 hearts and the offspring is showing at 10 hearts. I also had an offspring with the blacked out hearts bug as well.
This is on Bedrock for PC ver. 1.19.70
That ticket only addresses half the issue, yes. As stated (and shown in the pictures I provided) it also affects newly tamed horses that have not yet had armor applied prior to the update. If you apply armor to said horses, the armor does not appear on them even though it has been placed on the horse.
Just an update from my end - This is still an issue with the current version. again it only appears to be the textures on the Horse, Donkey, and Mule mobs. everything else is as it should be as far as I know. Please fix this issue. I'm kind of afraid to play my Realm in case something glitches and messes up my progress.
It seems to be fine for now. I've been using the same keyboard and mouse for the past few years and have never had the issue before. They are both wired. Again - Bedrock is the only game I was having an issue with. Java edition and every other game/program on my PC had no issued reading their inputs. The issues started the day before the this ticket was created.
It seems the glitch actually messed up the keybinds and wouldn't let me reset them to something usable. I was finally able to correct them and I'm able to play again as of this morning.