I started survival vanila server for me an few friends but after about a week server started laging. When it laged every mob stoped and if i would break a block it wouldn't drop, then i would time out, when i connected back on server the blocks i broke were broken droped on the ground.
This was hapening randomly while i played but later it started hapening as soon as i connect.
My frieds experience no problems, this hapens only to me.
Aloso i dont have poblems like this or other servers ( even moded minecraft servers).