On Windows 10 Edition, it is fine. Probably iOS specific.
This is just plain stupid.
Confirmed on MCPE 0.12.3 on HP Pavilion laptop with Windows 10.
I'm sure this will be added in the future 🙂
Happens to me too.
I can confirm this. Leaving the boat on a slime block for around 20 seconds will send it launching into the air. The game freezes, says "not responding" forever, and you have to close it.
Game Output when the launcher reopens says the following:
[20:39:05] [Server thread/WARN]: Boat (vehicle of MCEvan99) moved too quickly! 0.0,13.639999695122242,0.0
[20:39:05] [Server thread/WARN]: Boat (vehicle of MCEvan99) moved too quickly! 0.0,13.47999969869852,0.0
[20:39:05] [Server thread/WARN]: Boat (vehicle of MCEvan99) moved too quickly! 0.0,12.519999720156193,0.0
[20:39:06] [Server thread/WARN]: Boat (vehicle of MCEvan99) moved too quickly! 0.0,10.99999975413084,0.0
[20:39:09] [Server thread/WARN]: MCEvan99 was kicked for floating a vehicle too long!
[20:39:09] [Server thread/INFO]: MCEvan99 lost connection: TextComponent{text='Flying is not enabled on this server', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null, insertion=null}}
[20:39:09] [Server thread/INFO]: MCEvan99 left the game
[20:39:09] [Server thread/INFO]: Stopping singleplayer server as player logged out
[20:39:09] [Server thread/INFO]: Stopping server
[20:39:09] [Server thread/INFO]: Saving players
[20:39:09] [Server thread/INFO]: Saving worlds
Villagers have a small chance for this to occur (I believe).
This is not a bug, you don't tame horses like this. To tame them, simply right-click them with an empty hand. They will keep throwing you off. Keep clicking until heart particles appear. Your horse is tamed!
Hmm. Might be your graphics card.
Confirmed on Windows 10 v0.12.3. Possibly due to the hitbox being so big on it's back. That, I believe, is a bug.