Horses (Lamas too) change the color and/or disappear if they move through the portal.

Spigot 1.11
Ancient Gates 2.0.6

Yup, this needs to be recoded so they can be transported safely.
However are you talking about bungee portals or regular ones? I had lamas go through regular ones and they were fine.

regular ones no bungee

Build #2​1 - if i run "with" horse in a protal

Could not pass event PlayerMoveEvent to AncientGates v2.1
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at net.minecraft.server.v1_11_R1.PlayerConnection.a(PlayerConnection.java:398) [craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at net.minecraft.server.v1_11_R1.PacketPlayInVehicleMove.a(SourceFile:48) [craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at net.minecraft.server.v1_11_R1.PacketPlayInVehicleMove.a(SourceFile:9) [craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at net.minecraft.server.v1_11_R1.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_101]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_101]
at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:46) [craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:739) [craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:675) [craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:574) [craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
Caused by: java.lang.UnsupportedOperationException: Not supported.
at org.bukkit.craftbukkit.v1_11_R1.entity.CraftAbstractHorse.setVariant(CraftAbstractHorse.java:26) ~[craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
at org.mcteam.ancientgates.util.EntityUtil.setEntityTypeData(EntityUtil.java:189) ~[?:?]
at org.mcteam.ancientgates.util.TeleportUtil.teleportPlayer(TeleportUtil.java:91) ~[?:?]
at org.mcteam.ancientgates.listeners.PluginMovementListener.onPlayerMove(PluginMovementListener.java:104) ~[?:?]
at sun.reflect.GeneratedMethodAccessor107.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_101]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_101]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[craftbukkit.jar:git-Spigot-f950f8e-41ade2f]
... 15 more

Should be fixed.

if i run "with" horse in a protal, the player move to worldspawn and not to the other portal point (the horse works) ... its not fixed

can you please fix this bug?

player can duplicate horses if they run "on" a horse through a portal ... horses push through the portal works fine but ride through the portal is very defective