Normally, when you are riding a horse or anything else and throw an ender pearl, you leave your mount behind and teleport all alone.
With this mod, you now always bring the mount with you.
Report any issues you have to the tracker and enjoy
If you want to make your horse even smarter, also check out how your horse can always magically wait where it gets dismounted with https://www.curseforge.com/minecraft/mc-mods/stupid-horse-stand-still/
