Half of post deleted in wordpress after I press Update

Hi there,

This is very strange and I was looking into this for a long time now.
I make a post of say, 500 words. Then press Update (publish) and half of my post does not save. It only every saves 250 words.
Or sometimes 10 words.
I’ve cleared the cache, removed plugins. But still, the whole of my post does not say, just a part of it.

I did move the blog to a new server, I really don’t know what seems to be the problem.

Please help.
Thanks in advance.