Cannot Load existing level - Minecraft takes ages to start

This is the second time I have reported these bugs as your recent move deleted the last one.

BUG 1 - Loading Delay

We firstly have to endure the slowest start to a game I have ever seen. The load takes about 5 minutes to progress from a totally grey screen to the mojang logo. Then we wait for another age.

Then we can select our survival world.

BUG 2 - Crashing on Load

The game will crash on load approx 4 times out of five. It makes loading it highly frustrating. Almost Intolerable.

BUG 3 - Crashing 100% of the time when a new player joins

Very recently the second player has been unable to join. We created a new user (losing all the inventory and god weapons/armour) which worked - EXACTLY ONCE.  Now that new player also causes a 100% crash when attempting to load.

 

If the level is loaded (on average using the one in five chance of loading) then the game runs fine.

 

BUG 4 - Crashing while playing

The game will crash randomly. There is no pattern. Moving = crash. Turn round = crash. Place block = crash. It is unstable and buggy.

 

You should be ashamed of yourselves

As a game programmer of over two decades experience I am astonished how you can take working, reliable code and create this disgraceful mess. Please redeem yourselves immediately by FIXING THESE BUGS.