I left a horse at my spawn and it disappeared for days then I finally found it a week later in my barn... but it was originally on a lead... and my other horse by my house was on a lead attached to a post as well and has recently disappeared and I'm on an island no where near land... it's not to be seen at all....
no ones releasing them this is happening when no ones on the server
This is not the same issue as MC-14826 Leash / Lead disappear on game restart or chunk reload.
This issue is where the horse and the lead both disappear and horse is no longer existant